Always detach token from request.META

Author: adamantike

instrumentation/opentelemetry-instrumentation-django/src/opentelemetry/instrumentation/django/middleware.py

@@ -299,10 +299,7 @@ def process_response(self, request, response):
                 activation.__exit__(None, None, None)
 
         if self._environ_token in request.META.keys():
-            if is_asgi_request:
-                detach(request.META.get(self._environ_token))
-            else:
-                detach(request.environ.get(self._environ_token))
+            detach(request.META.get(self._environ_token))
             request.META.pop(self._environ_token)
 
         return response