Remove registration of video/audio callbacks based on TrackSource#110

stephen-derosa wants to merge 2 commits intolivekit:mainlivekit/client-sdk-cpp:mainfrom

stephen-derosa:sderosa/remove-source-type-callback-registrationstephen-derosa/sderosa-client-sdk-cpp:sderosa/remove-source-type-callback-registrationCopy head branch name to clipboard