Remove deprecated `-k foobar:` syntax

src/_pytest/deprecated.py

@@ -37,11 +37,6 @@ YIELD_FIXTURE = PytestDeprecationWarning(
     "Use @pytest.fixture instead; they are the same."
 )
 
-MINUS_K_COLON = PytestRemovedIn7Warning(
-    "The `-k 'expr:'` syntax to -k is deprecated.\n"
-    "Please open an issue if you use this and want a replacement."
-)
-
 WARNING_CMDLINE_PREPARSE_HOOK = PytestRemovedIn8Warning(
     "The pytest_cmdline_preparse hook is deprecated and will be removed in a future release. \n"
     "Please use pytest_load_initial_conftests hook instead."

src/_pytest/mark/__init__.py

@@ -1,5 +1,4 @@
 """Generic mechanism for marking and selecting python functions."""
-import warnings
 from typing import AbstractSet
 from typing import Collection
 from typing import List
@@ -23,7 +22,6 @@ from _pytest.config import ExitCode
 from _pytest.config import hookimpl
 from _pytest.config import UsageError
 from _pytest.config.argparsing import Parser
-from _pytest.deprecated import MINUS_K_COLON
 from _pytest.stash import StashKey
 
 if TYPE_CHECKING:
@@ -188,23 +186,14 @@ def deselect_by_keyword(items: "List[Item]", config: Config) -> None:
     if not keywordexpr:
         return
 
-    selectuntil = False
-    if keywordexpr[-1:] == ":":
-        # To be removed in pytest 8.0.0.
-        warnings.warn(MINUS_K_COLON, stacklevel=2)
-        selectuntil = True
-        keywordexpr = keywordexpr[:-1]
-
     expr = _parse_expression(keywordexpr, "Wrong expression passed to '-k'")
 
     remaining = []
     deselected = []
     for colitem in items:
-        if keywordexpr and not expr.evaluate(KeywordMatcher.from_item(colitem)):
+        if not expr.evaluate(KeywordMatcher.from_item(colitem)):
             deselected.append(colitem)
         else:
-            if selectuntil:
-                keywordexpr = None
             remaining.append(colitem)
 
     if deselected:

testing/deprecated_test.py

@@ -27,18 +27,6 @@ def test_external_plugins_integrated(pytester: Pytester, plugin) -> None:
         pytester.parseconfig("-p", plugin)
 
 
-def test_minus_k_colon_is_deprecated(pytester: Pytester) -> None:
-    threepass = pytester.makepyfile(
-        test_threepass="""
-        def test_one(): assert 1
-        def test_two(): assert 1
-        def test_three(): assert 1
-    """
-    )
-    result = pytester.runpytest("-k", "test_two:", threepass)
-    result.stdout.fnmatch_lines(["*The `-k 'expr:'` syntax*deprecated*"])
-
-
 def test_fscollector_gethookproxy_isinitpath(pytester: Pytester) -> None:
     module = pytester.getmodulecol(
         """

testing/test_mark.py

@@ -823,25 +823,6 @@ class TestKeywordSelection:
         assert len(dlist) == 1
         assert dlist[0].items[0].name == "test_1"
 
-    def test_select_starton(self, pytester: Pytester) -> None:
-        threepass = pytester.makepyfile(
-            test_threepass="""
-            def test_one(): assert 1
-            def test_two(): assert 1
-            def test_three(): assert 1
-        """
-        )
-        reprec = pytester.inline_run(
-            "-Wignore::pytest.PytestRemovedIn7Warning", "-k", "test_two:", threepass
-        )
-        passed, skipped, failed = reprec.listoutcomes()
-        assert len(passed) == 2
-        assert not failed
-        dlist = reprec.getcalls("pytest_deselected")
-        assert len(dlist) == 1
-        item = dlist[0].items[0]
-        assert item.name == "test_one"
-
     def test_keyword_extra(self, pytester: Pytester) -> None:
         p = pytester.makepyfile(
             """

testing/test_terminal.py

@@ -682,9 +682,7 @@ class TestTerminalFunctional:
                     pass
            """
         )
-        result = pytester.runpytest(
-            "-Wignore::pytest.PytestRemovedIn7Warning", "-k", "test_two:", testpath
-        )
+        result = pytester.runpytest("-k", "test_t", testpath)
         result.stdout.fnmatch_lines(
             ["collected 3 items / 1 deselected / 2 selected", "*test_deselected.py ..*"]
         )