This reverts commit 2843bbc96dc3deee0406bac5ec9440cf3385ef2e. Reason for revert: Even more references to unimplemented metrics remaining... Original change's description: > Reland "[Stats] Cleanup: Remove unimplemented metrics and obsolete TODOs." > > This is a reland of commit 626f87d90501fd8d7a4ea071686cd8befd0d430c > > Original change's description: > > [Stats] Cleanup: Remove unimplemented metrics and obsolete TODOs. > > > > In preparation for the spec moving closer to PR, let's not have > > placeholder metrics not implemented. > > > > Bug: webrtc:14167 > > Change-Id: If4688ef85b57f88154d490186b306b30414874e4 > > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/265383 > > Reviewed-by: Harald Alvestrand <hta@webrtc.org> > > Commit-Queue: Henrik Boström <hbos@webrtc.org> > > Cr-Commit-Position: refs/heads/main@{#37205} > > Bug: webrtc:14167 > Change-Id: Ifdc37e7a48fea516c727c06d2f510780386cb204 > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/265805 > Reviewed-by: Harald Alvestrand <hta@webrtc.org> > Auto-Submit: Henrik Boström <hbos@webrtc.org> > Commit-Queue: Harald Alvestrand <hta@webrtc.org> > Cr-Commit-Position: refs/heads/main@{#37215} Bug: webrtc:14167 Change-Id: I959d61512d5896224302a70aadbac6f75afc819e No-Presubmit: true No-Tree-Checks: true No-Try: true Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/265810 Commit-Queue: Henrik Boström <hbos@webrtc.org> Bot-Commit: rubber-stamper@appspot.gserviceaccount.com <rubber-stamper@appspot.gserviceaccount.com> Cr-Commit-Position: refs/heads/main@{#37217}