backend: Remove unused BaseLibraryUpdateProvider
backend: Remove unused BaseLibraryUpdateProvider

adamcik/mopidy,pacificIT/mopidy,ZenithDK/mopidy,ZenithDK/mopidy,kingosticks/mopidy,diandiankan/mopidy,woutervanwijk/mopidy,hkariti/mopidy,dbrgn/mopidy,abarisain/mopidy,swak/mopidy,tkem/mopidy,mopidy/mopidy,swak/mopidy,adamcik/mopidy,abarisain/mopidy,tkem/mopidy,priestd09/mopidy,jmarsik/mopidy,kingosticks/mopidy,rawdlite/mopidy,dbrgn/mopidy,ali/mopidy,mokieyue/mopidy,bencevans/mopidy,diandiankan/mopidy,SuperStarPL/mopidy,bencevans/mopidy,diandiankan/mopidy,mokieyue/mopidy,ali/mopidy,jcass77/mopidy,bencevans/mopidy,priestd09/mopidy,liamw9534/mopidy,jodal/mopidy,jcass77/mopidy,diandiankan/mopidy,adamcik/mopidy,rawdlite/mopidy,SuperStarPL/mopidy,glogiotatidis/mopidy,glogiotatidis/mopidy,rawdlite/mopidy,quartz55/mopidy,glogiotatidis/mopidy,vrs01/mopidy,swak/mopidy,hkariti/mopidy,vrs01/mopidy,hkariti/mopidy,quartz55/mopidy,priestd09/mopidy,jodal/mopidy,bencevans/mopidy,ZenithDK/mopidy,SuperStarPL/mopidy,mopidy/mopidy,pacificIT/mopidy,bacontext/mopidy,glogiotatidis/mopidy,dbrgn/mopidy,jmarsik/mopidy,SuperStarPL/mopidy,mokieyue/mopidy,bacontext/mopidy,ali/mopidy,vrs01/mopidy,woutervanwijk/mopidy,vrs01/mopidy,kingosticks/mopidy,quartz55/mopidy,jodal/mopidy,jmarsik/mopidy,rawdlite/mopidy,bacontext/mopidy,quartz55/mopidy,bacontext/mopidy,jmarsik/mopidy,dbrgn/mopidy,tkem/mopidy,pacificIT/mopidy,mokieyue/mopidy,pacificIT/mopidy,swak/mopidy,mopidy/mopidy,liamw9534/mopidy,hkariti/mopidy,tkem/mopidy,ZenithDK/mopidy,ali/mopidy,jcass77/mopidy