Do some cleanup and update changelog

Author: Crozzers

CHANGES.md

@@ -2,7 +2,7 @@
 
 ## python-markdown2 2.5.4 (not yet released)
 
-(nothing yet)
+- [pull #617] Add MarkdownFileLinks extra (#528)
 
 
 ## python-markdown2 2.5.3

lib/markdown2.py

@@ -1447,25 +1447,6 @@ def _find_balanced(self, text: str, start: int, open_c: str, close_c: str) -> in
             i += 1
         return i
 
-    def _extract_url_and_title(self, text: str, start: int) -> Union[tuple[str, str, int], tuple[None, None, None]]:
-        """Extracts the url and (optional) title from the tail of a link"""
-        # text[start] equals the opening parenthesis
-        idx = self._find_non_whitespace(text, start+1)
-        if idx == len(text):
-            return None, None, None
-        end_idx = idx
-        has_anglebrackets = text[idx] == "<"
-        if has_anglebrackets:
-            end_idx = self._find_balanced(text, end_idx+1, "<", ">")
-        end_idx = self._find_balanced(text, end_idx, "(", ")")
-        match = self._inline_link_title.search(text, idx, end_idx)
-        if not match:
-            return None, None, None
-        url, title = text[idx:match.start()], match.group("title")
-        if has_anglebrackets:
-            url = self._strip_anglebrackets.sub(r'\1', url)
-        return url, title, end_idx
-
     # https://developer.mozilla.org/en-US/docs/web/http/basics_of_http/data_urls
     # https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/MIME_types
     _data_url_re = re.compile(r'''