Remove deprecated packages proto-lens-combinators and lens-labels.
Remove deprecated packages proto-lens-combinators and lens-labels.

They were merged into the latest release of the proto-lens package
(0.5.0.0).

spencerjanssen/stackage,mrkkrp/stackage,peti/stackage,soenkehahn/stackage,athanclark/stackage,Daniel-Diaz/stackage,stackbuilders/stackage,asr/stackage,iand675/stackage,massysett/stackage,wereHamster/stackage,clinty/stackage,ethercrow/stackage,mstksg/stackage,int-index/stackage,fimad/stackage,jonschoning/stackage,simonmichael/stackage,fpco/stackage,michalkonecny/stackage