Remove tests not relevant to the backported security fix.

Ref #123426 (comment)

Lib/test/test_zipfile.py

@@ -3296,39 +3296,6 @@ def test_malformed_paths(self):
         assert list(map(str, root.iterdir())) == ['../']
         assert root.joinpath('..').joinpath('parent.txt').read_bytes() == b'content'
 
-    def test_unsupported_names(self):
-        """
-        Path segments with special characters are readable.
-
-        On some platforms or file systems, characters like
-        ``:`` and ``?`` are not allowed, but they are valid
-        in the zip file.
-        """
-        data = io.BytesIO()
-        zf = zipfile.ZipFile(data, "w")
-        zf.writestr("path?", b"content")
-        zf.writestr("V: NMS.flac", b"fLaC...")
-        zf.filename = ''
-        root = zipfile.Path(zf)
-        contents = root.iterdir()
-        assert next(contents).name == 'path?'
-        item = next(contents)
-        assert item.name == 'V: NMS.flac', item.name
-        assert root.joinpath('V: NMS.flac').read_bytes() == b"fLaC..."
-
-    def test_backslash_not_separator(self):
-        """
-        In a zip file, backslashes are not separators.
-        """
-        data = io.BytesIO()
-        zf = zipfile.ZipFile(data, "w")
-        zf.writestr(DirtyZipInfo.for_name("foo\\bar", zf), b"content")
-        zf.filename = ''
-        root = zipfile.Path(zf)
-        (first,) = root.iterdir()
-        assert not first.is_dir()
-        assert first.name == 'foo\\bar', first.name
-
 
 class DirtyZipInfo(zipfile.ZipInfo):
     """