Remove some dead code

- I wrote a thing: https://github.com/asottile/dead
- wanted to try it out, there's lots of false positives and I didn't look
  through all the things it pointed out but here's some

src/_pytest/_code/code.py

@@ -23,8 +23,6 @@ from _pytest.compat import _PY3
 from _pytest.compat import PY35
 from _pytest.compat import safe_str
 
-builtin_repr = repr
-
 if _PY3:
     from traceback import format_exception_only
 else:
@@ -947,8 +945,6 @@ class ReprEntryNative(TerminalRepr):
 
 
 class ReprEntry(TerminalRepr):
-    localssep = "_ "
-
     def __init__(self, lines, reprfuncargs, reprlocals, filelocrepr, style):
         self.lines = lines
         self.reprfuncargs = reprfuncargs
@@ -970,7 +966,6 @@ class ReprEntry(TerminalRepr):
             red = line.startswith("E   ")
             tw.line(line, bold=True, red=red)
         if self.reprlocals:
-            # tw.sep(self.localssep, "Locals")
             tw.line("")
             self.reprlocals.toterminal(tw)
         if self.reprfileloc:

src/_pytest/assertion/rewrite.py

@@ -51,19 +51,6 @@ else:
         return ast.Call(a, b, c, None, None)
 
 
-def ast_Call_helper(func_name, *args, **kwargs):
-    """
-    func_name: str
-    args: Iterable[ast.expr]
-    kwargs: Dict[str,ast.expr]
-    """
-    return ast.Call(
-        ast.Name(func_name, ast.Load()),
-        list(args),
-        [ast.keyword(key, val) for key, val in kwargs.items()],
-    )
-
-
 class AssertionRewritingHook(object):
     """PEP302 Import hook which rewrites asserts."""
 

src/_pytest/fixtures.py

@@ -660,12 +660,6 @@ class SubRequest(FixtureRequest):
         self._fixturedef.addfinalizer(finalizer)
 
 
-class ScopeMismatchError(Exception):
-    """ A fixture function tries to use a different fixture function which
-    which has a lower scope (e.g. a Session one calls a function one)
-    """
-
-
 scopes = "session package module class function".split()
 scopenum_function = scopes.index("function")
 

src/_pytest/junitxml.py

@@ -19,6 +19,7 @@ import sys
 import time
 
 import py
+import six
 
 import pytest
 from _pytest import nodes
@@ -27,10 +28,6 @@ from _pytest.config import filename_arg
 # Python 2.X and 3.X compatibility
 if sys.version_info[0] < 3:
     from codecs import open
-else:
-    unichr = chr
-    unicode = str
-    long = int
 
 
 class Junit(py.xml.Namespace):
@@ -45,12 +42,12 @@ class Junit(py.xml.Namespace):
 _legal_chars = (0x09, 0x0A, 0x0D)
 _legal_ranges = ((0x20, 0x7E), (0x80, 0xD7FF), (0xE000, 0xFFFD), (0x10000, 0x10FFFF))
 _legal_xml_re = [
-    unicode("%s-%s") % (unichr(low), unichr(high))
+    u"%s-%s" % (six.unichr(low), six.unichr(high))
     for (low, high) in _legal_ranges
     if low < sys.maxunicode
 ]
-_legal_xml_re = [unichr(x) for x in _legal_chars] + _legal_xml_re
-illegal_xml_re = re.compile(unicode("[^%s]") % unicode("").join(_legal_xml_re))
+_legal_xml_re = [six.unichr(x) for x in _legal_chars] + _legal_xml_re
+illegal_xml_re = re.compile(u"[^%s]" % u"".join(_legal_xml_re))
 del _legal_chars
 del _legal_ranges
 del _legal_xml_re
@@ -62,9 +59,9 @@ def bin_xml_escape(arg):
     def repl(matchobj):
         i = ord(matchobj.group())
         if i <= 0xFF:
-            return unicode("#x%02X") % i
+            return u"#x%02X" % i
         else:
-            return unicode("#x%04X") % i
+            return u"#x%04X" % i
 
     return py.xml.raw(illegal_xml_re.sub(repl, py.xml.escape(arg)))
 
@@ -194,7 +191,7 @@ class _NodeReporter(object):
         else:
             if hasattr(report.longrepr, "reprcrash"):
                 message = report.longrepr.reprcrash.message
-            elif isinstance(report.longrepr, (unicode, str)):
+            elif isinstance(report.longrepr, six.string_types):
                 message = report.longrepr
             else:
                 message = str(report.longrepr)

src/_pytest/python.py

@@ -283,9 +283,6 @@ class PyobjMixin(PyobjContext):
         s = ".".join(parts)
         return s.replace(".[", "[")
 
-    def _getfslineno(self):
-        return getfslineno(self.obj)
-
     def reportinfo(self):
         # XXX caching?
         obj = self.obj
@@ -1252,7 +1249,6 @@ class Function(FunctionMixin, nodes.Item, fixtures.FuncargnamesCompatAttr):
     Python test function.
     """
 
-    _genid = None
     # disable since functions handle it themselves
     _ALLOW_MARKERS = False
 
@@ -1327,7 +1323,6 @@ class Function(FunctionMixin, nodes.Item, fixtures.FuncargnamesCompatAttr):
             if hasattr(self, "callspec"):
                 callspec = self.callspec
                 assert not callspec.funcargs
-                self._genid = callspec.id
                 if hasattr(callspec, "param"):
                     self.param = callspec.param
         self._request = fixtures.FixtureRequest(self)

src/_pytest/reports.py

@@ -158,16 +158,6 @@ class TestReport(BaseReport):
         )
 
 
-class TeardownErrorReport(BaseReport):
-    outcome = "failed"
-    when = "teardown"
-
-    def __init__(self, longrepr, **extra):
-        self.longrepr = longrepr
-        self.sections = []
-        self.__dict__.update(extra)
-
-
 class CollectReport(BaseReport):
     def __init__(self, nodeid, outcome, longrepr, result, sections=(), **extra):
         self.nodeid = nodeid

src/_pytest/resultlog.py

@@ -47,30 +47,6 @@ def pytest_unconfigure(config):
         config.pluginmanager.unregister(resultlog)
 
 
-def generic_path(item):
-    chain = item.listchain()
-    gpath = [chain[0].name]
-    fspath = chain[0].fspath
-    fspart = False
-    for node in chain[1:]:
-        newfspath = node.fspath
-        if newfspath == fspath:
-            if fspart:
-                gpath.append(":")
-                fspart = False
-            else:
-                gpath.append(".")
-        else:
-            gpath.append("/")
-            fspart = True
-        name = node.name
-        if name[0] in "([":
-            gpath.pop()
-        gpath.append(name)
-        fspath = newfspath
-    return "".join(gpath)
-
-
 class ResultLog(object):
     def __init__(self, config, logfile):
         self.config = config

src/_pytest/terminal.py

@@ -841,15 +841,6 @@ class TerminalReporter(object):
             self.write_line(msg, **markup)
 
 
-def repr_pythonversion(v=None):
-    if v is None:
-        v = sys.version_info
-    try:
-        return "%s.%s.%s-%s-%s" % v
-    except (TypeError, ValueError):
-        return str(v)
-
-
 def build_summary_stats_line(stats):
     keys = ("failed passed skipped deselected xfailed xpassed warnings error").split()
     unknown_key_seen = False

testing/python/metafunc.py

@@ -784,7 +784,6 @@ class TestMetafuncFunctional(object):
 
             @pytest.fixture
             def metafunc(request):
-                assert request._pyfuncitem._genid == "0"
                 return request.param
 
             def test_function(metafunc, pytestconfig):

testing/test_resultlog.py

@@ -8,10 +8,6 @@ import py
 
 import _pytest._code
 import pytest
-from _pytest.nodes import FSCollector
-from _pytest.nodes import Item
-from _pytest.nodes import Node
-from _pytest.resultlog import generic_path
 from _pytest.resultlog import pytest_configure
 from _pytest.resultlog import pytest_unconfigure
 from _pytest.resultlog import ResultLog
@@ -20,31 +16,6 @@ from _pytest.resultlog import ResultLog
 pytestmark = pytest.mark.filterwarnings("ignore:--result-log is deprecated")
 
 
-def test_generic_path(testdir):
-    from _pytest.main import Session
-
-    config = testdir.parseconfig()
-    session = Session(config)
-    p1 = Node("a", config=config, session=session, nodeid="a")
-    # assert p1.fspath is None
-    p2 = Node("B", parent=p1)
-    p3 = Node("()", parent=p2)
-    item = Item("c", parent=p3)
-
-    res = generic_path(item)
-    assert res == "a.B().c"
-
-    p0 = FSCollector("proj/test", config=config, session=session)
-    p1 = FSCollector("proj/test/a", parent=p0)
-    p2 = Node("B", parent=p1)
-    p3 = Node("()", parent=p2)
-    p4 = Node("c", parent=p3)
-    item = Item("[1]", parent=p4)
-
-    res = generic_path(item)
-    assert res == "test/a:B().c[1]"
-
-
 def test_write_log_entry():
     reslog = ResultLog(None, None)
     reslog.logfile = py.io.TextIO()

testing/test_runner.py

@@ -465,12 +465,7 @@ class TestSessionReports(object):
         assert res[1].name == "TestClass"
 
 
-reporttypes = [
-    reports.BaseReport,
-    reports.TestReport,
-    reports.TeardownErrorReport,
-    reports.CollectReport,
-]
+reporttypes = [reports.BaseReport, reports.TestReport, reports.CollectReport]
 
 
 @pytest.mark.parametrize(

testing/test_session.py

@@ -181,7 +181,6 @@ class TestNewSession(SessionTests):
         passed, skipped, failed = reprec.countoutcomes()
         assert failed == skipped == 0
         assert passed == 7
-        # also test listnames() here ...
 
     def test_collect_only_with_various_situations(self, testdir):
         p = testdir.makepyfile(

testing/test_terminal.py

@@ -18,7 +18,6 @@ from _pytest.main import EXIT_NOTESTSCOLLECTED
 from _pytest.terminal import _plugin_nameversions
 from _pytest.terminal import build_summary_stats_line
 from _pytest.terminal import getreportopt
-from _pytest.terminal import repr_pythonversion
 from _pytest.terminal import TerminalReporter
 
 DistInfo = collections.namedtuple("DistInfo", ["project_name", "version"])
@@ -361,16 +360,6 @@ class TestCollectonly(object):
         result.stdout.fnmatch_lines(["*test_fun.py: 1*"])
 
 
-def test_repr_python_version(monkeypatch):
-    try:
-        monkeypatch.setattr(sys, "version_info", (2, 5, 1, "final", 0))
-        assert repr_pythonversion() == "2.5.1-final-0"
-        sys.version_info = x = (2, 3)
-        assert repr_pythonversion() == str(x)
-    finally:
-        monkeypatch.undo()  # do this early as pytest can get confused
-
-
 class TestFixtureReporting(object):
     def test_setup_fixture_error(self, testdir):
         testdir.makepyfile(