py36+: remove pathlib2 compatibility shim

doc/en/builtin.rst

@@ -169,10 +169,6 @@ For information about fixtures, see :ref:`fixtures`. To see a complete list of a
 
         The returned object is a :class:`pathlib.Path` object.
 
-        .. note::
-
-            In python < 3.6 this is a pathlib2.Path.
-
 
     no tests ran in 0.12s
 

doc/en/tmpdir.rst

@@ -15,7 +15,7 @@ You can use the ``tmp_path`` fixture which will
 provide a temporary directory unique to the test invocation,
 created in the `base temporary directory`_.
 
-``tmp_path`` is a ``pathlib/pathlib2.Path`` object. Here is an example test usage:
+``tmp_path`` is a ``pathlib.Path`` object. Here is an example test usage:
 
 .. code-block:: python
 

setup.cfg

@@ -48,7 +48,6 @@ install_requires =
     atomicwrites>=1.0;sys_platform=="win32"
     colorama;sys_platform=="win32"
     importlib-metadata>=0.12;python_version<"3.8"
-    pathlib2>=2.2.0;python_version<"3.6"
 python_requires = >=3.6
 package_dir =
     =src

src/_pytest/pathlib.py

@@ -14,6 +14,8 @@ from os.path import expanduser
 from os.path import expandvars
 from os.path import isabs
 from os.path import sep
+from pathlib import Path
+from pathlib import PurePath
 from posixpath import sep as posix_sep
 from types import ModuleType
 from typing import Callable
@@ -30,11 +32,6 @@ from _pytest.compat import assert_never
 from _pytest.outcomes import skip
 from _pytest.warning_types import PytestWarning
 
-if sys.version_info[:2] >= (3, 6):
-    from pathlib import Path, PurePath
-else:
-    from pathlib2 import Path, PurePath
-
 __all__ = ["Path", "PurePath"]
 
 

src/_pytest/tmpdir.py

@@ -190,10 +190,6 @@ def tmp_path(request: FixtureRequest, tmp_path_factory: TempPathFactory) -> Path
     directory.
 
     The returned object is a :class:`pathlib.Path` object.
-
-    .. note::
-
-        In python < 3.6 this is a pathlib2.Path.
     """
 
     return _mk_tmp(request, tmp_path_factory)