exp/audio/al: delete a debugging log message.
exp/audio/al: delete a debugging log message.

This was accidentally introduced in
https://go-review.googlesource.com/#/c/11351/

Change-Id: Icc9bc9ccb97e48d376e0da440b72631e605a0a15
Reviewed-on: https://go-review.googlesource.com/11608
Reviewed-by: Hyang-Ah Hana Kim <d7e82c3c07f92613bcbf9a1e88f6b96c13caa3b0@gmail.com>

cainiaocome/mobile,lonphy23t/mobile,b54898533/mobile,qskycolor/mobile,ichu501/mobile,ichu501/mobile,xing/gomobile,goldcaddy77/mobile,zach-klippenstein/mobile,goldcaddy77/mobile,DanielWorld/mobile,samanalysis/mobile,lonphy23t/mobile,zach-klippenstein/mobile,swisspol/mobile,tempbottle/mobile,swisspol/mobile,swisspol/mobile,0x90sled/mobile,ppamorim/mobile,MaxCy330/mobile,goldcaddy77/mobile,golang/mobile,DanielWorld/mobile,0x90sled/mobile,ichu501/mobile,cainiaocome/mobile,freeman0211/mobile,zach-klippenstein/mobile,samanalysis/mobile,steeve/mobile,MaxCy330/mobile,golang/mobile,freeman0211/mobile,ppamorim/mobile,tempbottle/mobile,golang/mobile,steeve/mobile,ppamorim/mobile,qskycolor/mobile,ichu501/mobile,samanalysis/mobile,xing/gomobile,DanielWorld/mobile,lonphy23t/mobile,0x90sled/mobile,ppamorim/mobile,cainiaocome/mobile,samanalysis/mobile,tempbottle/mobile,lonphy23t/mobile,golang/mobile,swisspol/mobile,b54898533/mobile,freeman0211/mobile,MaxCy330/mobile,0x90sled/mobile,steeve/mobile,xing/gomobile,lonphy23t/mobile,steeve/mobile,ichu501/mobile,goldcaddy77/mobile,b54898533/mobile,qskycolor/mobile,cainiaocome/mobile,tempbottle/mobile,qskycolor/mobile,tempbottle/mobile,xing/gomobile,MaxCy330/mobile,0x90sled/mobile,goldcaddy77/mobile,xing/gomobile,freeman0211/mobile,b54898533/mobile,cainiaocome/mobile,b54898533/mobile,samanalysis/mobile,swisspol/mobile,MaxCy330/mobile,zach-klippenstein/mobile,ppamorim/mobile,DanielWorld/mobile