cleanup: Remove the startBitrate option. (#8193)

config.js

@@ -679,7 +679,6 @@ var config = {
      forceJVB121Ratio
      hiddenDomain
      ignoreStartMuted
-     startBitrate
      */
 
 

react/features/base/config/configWhitelist.js

@@ -138,7 +138,6 @@ export default [
     'resolution',
     'startAudioMuted',
     'startAudioOnly',
-    'startBitrate',
     'startScreenSharing',
     'startSilent',
     'startVideoMuted',