GH-127381: pathlib ABCs: remove `case_sensitive` argument (#131024)

Remove the *case_sensitive* argument from `_JoinablePath.full_match()` and
`_ReadablePath.glob()`. Using a non-native case sensitivity forces the use
of "case-pedantic" globbing, where we `iterdir()` even for non-wildcard
pattern segments. But it's hard to know when to enable this mode, as
case-sensitivity can vary by directory, so `_PathParser.normcase()` doesn't
always give the full picture. The `Path.glob()` implementation is forced to
make an educated guess, but we can avoid the issue in the ABCs by dropping
the *case_sensitive* argument.

(I probably shouldn't have added these arguments in `PurePath` and `Path`
in the first place!)

Also drop support for `_ReadablePath.glob(recurse_symlinks=False)`, which
makes recursive globbing much slower.

1 files changed, 0 insertions, 5 deletions

diff --git a/Lib/test/test_pathlib/test_join.py b/Lib/test/test_pathlib/test_join.py
index 93fd1e6488c..03a3ecfd248 100644
--- a/Lib/test/test_pathlib/test_join.py
+++ b/Lib/test/test_pathlib/test_join.py
@@ -130,11 +130,6 @@ class JoinTestBase:
         self.assertFalse(P('a/b/c.py').full_match('**/a/b/c./**'))
         self.assertFalse(P('a/b/c.py').full_match('/a/b/c.py/**'))
         self.assertFalse(P('a/b/c.py').full_match('/**/a/b/c.py'))
-        # Case-sensitive flag
-        self.assertFalse(P('A.py').full_match('a.PY', case_sensitive=True))
-        self.assertTrue(P('A.py').full_match('a.PY', case_sensitive=False))
-        self.assertFalse(P('c:/a/B.Py').full_match('C:/A/*.pY', case_sensitive=True))
-        self.assertTrue(P('/a/b/c.py').full_match('/A/*/*.Py', case_sensitive=False))
         # Matching against empty path
         self.assertFalse(P('').full_match('*'))
         self.assertTrue(P('').full_match('**'))