Fix stubtest errors on beautifulsoup4 (#9648)

Fixes #9645.

Author: AlexWaygood

stubs/beautifulsoup4/bs4/builder/_htmlparser.pyi

@@ -4,15 +4,12 @@ from typing import Any
 
 from bs4.builder import HTMLTreeBuilder
 
-class HTMLParseError(Exception): ...
-
 class BeautifulSoupHTMLParser(HTMLParser):
     IGNORE: str
     REPLACE: str
     on_duplicate_attribute: Any
     already_closed_empty_element: Any
     def __init__(self, *args, **kwargs) -> None: ...
-    def error(self, msg: str) -> None: ...
     def handle_startendtag(self, name, attrs) -> None: ...
     def handle_starttag(self, name, attrs, handle_empty_element: bool = ...) -> None: ...
     def handle_endtag(self, name, check_already_closed: bool = ...) -> None: ...