[Pygments] Cleanup metaclass workarounds for mypy<1.1 (#15607)

stubs/Pygments/@tests/stubtest_allowlist.txt

@@ -2,34 +2,17 @@
 pygments.lexer.LexerMeta.__new__
 pygments.style.StyleMeta.__new__
 
-# Defined in lexer classes, intended to be used as static method, but doesn't use @staticmethod
-pygments.lexer.Lexer(Meta)?.analyse_text
-
 # Inheriting from tuple is weird
 pygments.token._TokenType.__init__
 
 # Cannot import in stubtest (SystemExit: 2)
 pygments.__main__
 
-# Class attributes that are typed in the metaclass instead. See comment in stubs.
+# Class attributes that are set to None in the base class, but are
+# always overridden with a non-None value in subclasses.
 pygments.lexer.Lexer.name
-pygments.lexer.Lexer.aliases
-pygments.lexer.Lexer.filenames
-pygments.lexer.Lexer.alias_filenames
-pygments.lexer.Lexer.mimetypes
-pygments.lexer.Lexer.priority
 pygments.lexer.Lexer.url
 pygments.lexer.Lexer.version_added
-pygments.style.Style.background_color
-pygments.style.Style.highlight_color
-pygments.style.Style.line_number_color
-pygments.style.Style.line_number_background_color
-pygments.style.Style.line_number_special_color
-pygments.style.Style.line_number_special_background_color
-pygments.style.Style.styles
-pygments.style.Style.name
-pygments.style.Style.aliases
-pygments.style.Style.web_style_gallery_exclude
 
 # Individual lexers and styles submodules are not stubbed at this time.
 pygments\.lexers\.(?!get_|find_|load_|guess_).*

stubs/Pygments/@tests/test_cases/check_pygments.py

@@ -0,0 +1,10 @@
+from typing_extensions import assert_type
+
+from pygments.style import Style, _StyleDict
+from pygments.token import _TokenType
+
+
+def test_style_class_iterable(style_class: type[Style]) -> None:
+    for t, d in style_class:
+        assert_type(t, _TokenType)
+        assert_type(d, _StyleDict)