242d8bdddd
This removes the QTKit based capturer for mac, and removes the need to link against deprecated system libraries on macOS. BUG=webrtc:3968,webrtc:6275,webrtc:6333 Review-Url: https://codereview.webrtc.org/2309253005 Cr-Commit-Position: refs/heads/master@{#14418}