Remove unnecessary non-capture group

Author: cdce8p

pycodestyle.py

@@ -152,7 +152,7 @@ def lru_cache(maxsize=128):  # noqa as it's a fake implementation.
 COMPARE_TYPE_REGEX = re.compile(r'(?:[=!]=|is(?:\s+not)?)\s+type(?:s.\w+Type'
                                 r'|\s*\(\s*([^)]*[^ )])\s*\))')
 KEYWORD_REGEX = re.compile(r'(\s*)\b(?:%s)\b(\s*)' % r'|'.join(KEYWORDS))
-OPERATOR_REGEX = re.compile(r'(?:[^,\s])(\s*)(?:(?:[-+*/|!<=>%&^]+|:=))(\s*)')
+OPERATOR_REGEX = re.compile(r'(?:[^,\s])(\s*)(?:[-+*/|!<=>%&^]+|:=)(\s*)')
 LAMBDA_REGEX = re.compile(r'\blambda\b')
 HUNK_REGEX = re.compile(r'^@@ -\d+(?:,\d+)? \+(\d+)(?:,(\d+))? @@.*$')
 STARTSWITH_DEF_REGEX = re.compile(r'^(async\s+def|def)\b')