remove if in flask.request.url_rule

Author: GonzaloGuasch

instrumentation/opentelemetry-instrumentation-flask/src/opentelemetry/instrumentation/flask/__init__.py

@@ -348,9 +348,8 @@ def _start_response(status, response_headers, *args, **kwargs):
                 excluded_urls is None
                 or not excluded_urls.url_disabled(flask.request.url)
             ):
-                if flask.request.url_rule:
-                    nonlocal request_route
-                    request_route = flask.request.url_rule
+                nonlocal request_route
+                request_route = flask.request.url_rule
 
                 span = flask.request.environ.get(_ENVIRON_SPAN_KEY)