[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

mdit_py_plugins/superscript/index.py

@@ -29,14 +29,11 @@
 from __future__ import annotations
 """
 
-from collections.abc import Sequence
 import re
-from typing import TYPE_CHECKING
 
 from markdown_it import MarkdownIt
 from markdown_it.rules_inline import StateInline
 
-
 UNESCAPE_RE = re.compile(r"\\([ \\!\"#$%&'()*+,./:;<=>?@[\]^_`{|}~-])")
 WHITESPACE_RE = re.compile(r"(^|[^\\])(\\\\)*\s")