message: sdp: remove old workaround
  Removes an old workaround for a firefox issue that was fixed in 2014.
  Cr-Commit-Position: refs/heads/master@{#31584}
diff: @@ -2631,12 +2631,6 @@ bool ParseMediaDescription(
  std::vector<int> payload_types;
  if (cricket::IsRtpProtocol(protocol)) {
  for (size_t j = 3; j < fields.size(); ++j) {
  - // TODO(wu): Remove when below bug is fixed.
  - // https://bugzilla.mozilla.org/show_bug.cgi?id=996329
  - if (fields[j].empty() && j == fields.size() - 1) {
  - continue;
  - }
  -
  int pl = 0;
  if (!GetPayloadTypeFromString(line, fields[j], &pl, error)) {
  return false;
  