CoreAudio: cleanup
CoreAudio: cleanup

andrewrk/libsoundio,WilliamRen/libsoundio,shaunstanislaus/libsoundio,gityf/libsoundio,adrian-stepien/libsoundio,davidgranstrom/libsoundio,weizhiwu/libsoundio,weizhiwu/libsoundio,vanloswang/libsoundio,adrian-stepien/libsoundio,WilliamRen/libsoundio,tmatth/libsoundio,island-org/libsoundio,andrewrk/libsoundio,bestwpw/libsoundio,vanloswang/libsoundio,davidgranstrom/libsoundio,bestwpw/libsoundio,island-org/libsoundio,tresf/libsoundio,shaunstanislaus/libsoundio,tresf/libsoundio,gityf/libsoundio,tmatth/libsoundio