Delete unused members of VideoCodecH264.

profile-level-id for H.264 comes in through the SdpVideoFormat,
rather than through these members.

Bug: None
Change-Id: I9c4ea8873346ca16174aecf5f90a649cbaf913dd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/132545
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Rasmus Brandt <brandtr@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27571}

modules/video_coding/codecs/test/videocodec_test_fixture_impl.cc

@@ -124,7 +124,6 @@ std::string CodecSpecificToString(const VideoCodec& codec) {
     case kVideoCodecH264:
       ss << "frame_dropping: " << codec.H264().frameDroppingOn;
       ss << "\nkey_frame_interval: " << codec.H264().keyFrameInterval;
-      ss << "\nprofile: " << codec.H264().profile;
       break;
     default:
       break;