Trim the docs on dependency installation (#2139)
Trim the docs on dependency installation (#2139)

mosesfistos1/beetbox,pkess/beets,xsteadfastx/beets,shamangeorge/beets,beetbox/beets,sampsyo/beets,Kraymer/beets,beetbox/beets,madmouser1/beets,MyTunesFreeMusic/privacy-policy,mosesfistos1/beetbox,xsteadfastx/beets,sampsyo/beets,xsteadfastx/beets,MyTunesFreeMusic/privacy-policy,MyTunesFreeMusic/privacy-policy,beetbox/beets,artemutin/beets,jackwilsdon/beets,mosesfistos1/beetbox,diego-plan9/beets,sampsyo/beets,pkess/beets,diego-plan9/beets,mosesfistos1/beetbox,SusannaMaria/beets,MyTunesFreeMusic/privacy-policy,madmouser1/beets,madmouser1/beets,jackwilsdon/beets,lengtche/beets,SusannaMaria/beets,xsteadfastx/beets,madmouser1/beets,artemutin/beets,pkess/beets,ibmibmibm/beets,diego-plan9/beets,artemutin/beets,SusannaMaria/beets,sampsyo/beets,lengtche/beets,shamangeorge/beets,lengtche/beets,jackwilsdon/beets,Kraymer/beets,lengtche/beets,ibmibmibm/beets,Kraymer/beets,ibmibmibm/beets,pkess/beets,shamangeorge/beets,Kraymer/beets,diego-plan9/beets,ibmibmibm/beets,shamangeorge/beets,SusannaMaria/beets,jackwilsdon/beets,artemutin/beets,beetbox/beets