This change achieves an Idle Wakeup savings of 200 Hz. ModuleRtcRtcpImpl2 had Process() logic only active if TMMBR() is enabled in RtcpSender, which it never is. Hence the Module inheritance could be removed. The change removes all known dependencies of the module inheritance, and any related mentions of ProcessThread. Fixed: webrtc:11581 Change-Id: I440942f07187fdb9ac18186dab088633969b340e Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/222604 Reviewed-by: Tommi <tommi@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Markus Handell <handellm@webrtc.org> Cr-Commit-Position: refs/heads/master@{#34358}