[mediacapture-main] new commits pushed by alvestrand

The following commits were just pushed by alvestrand to https://github.com/w3c/mediacapture-main:

* Remove unmaintained changelog
  by Dominique Hazael-Massieux
https://github.com/w3c/mediacapture-main/commit/8c33bb69218d14bb4e2d81b3e03891628192601f

* Merge pull request #624 from w3c/rm-changelog

Remove unmaintained changelog
  by Harald Alvestrand
https://github.com/w3c/mediacapture-main/commit/fc111fbb0adeb61aba58c740fdfabd92887db8fc