cleanup after revert

test/test_networking.py

@@ -980,7 +980,6 @@ def test_impersonate(self, handler, params, extensions):
             # Check that user agent is added over ours
             assert 'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36' in res
 
-    @pytest.mark.parametrize('handler', ['CurlCFFI'], indirect=True)
     def test_headers(self, handler):
         with handler(headers=std_headers) as rh:
             # Ensure curl-impersonate overrides our standard headers (usually added

yt_dlp/networking/impersonate.py

@@ -123,6 +123,7 @@ def _get_impersonate_headers(self, request):
         headers = self._merge_headers(request.headers)
         if self._get_request_target(request) is not None:
             # remove all headers present in std_headers
+            # todo: change this to not depend on std_headers
             for header in std_headers:
                 if header in headers and std_headers[header] == headers[header]:
                     headers.pop(header, None)