Revert "Merge pull request #5792 from dynatrace-oss-contrib/bugfix/badcase"

This reverts commit 955e542210, reversing
changes made to 0215bcd84e.

Will attempt a simpler approach

src/_pytest/pathlib.py

@@ -11,7 +11,6 @@ from functools import partial
 from os.path import expanduser
 from os.path import expandvars
 from os.path import isabs
-from os.path import normcase
 from os.path import sep
 from posixpath import sep as posix_sep
 
@@ -335,12 +334,3 @@ def fnmatch_ex(pattern, path):
 def parts(s):
     parts = s.split(sep)
     return {sep.join(parts[: i + 1]) or sep for i in range(len(parts))}
-
-
-def unique_path(path):
-    """Returns a unique path in case-insensitive (but case-preserving) file
-    systems such as Windows.
-
-    This is needed only for ``py.path.local``; ``pathlib.Path`` handles this
-    natively with ``resolve()``."""
-    return type(path)(normcase(str(path.realpath())))