Revert "servant-subscriber has haddock error (#1846): eskimor/servant-subscriber#9"
Revert "servant-subscriber has haddock error (#1846): eskimor/servant-subscriber#9"

should be fixed by servant-subscriber-0.5.0.2

This reverts commit 257d3e8b33d316922c9ba36d39ae977fbbca9619.

l29ah/stackage,clinty/stackage,creichert/stackage,Daniel-Diaz/stackage,asr/stackage,michalkonecny/stackage,Shimuuar/stackage,wereHamster/stackage,mstksg/stackage,stackbuilders/stackage,massysett/stackage,k0ral/stackage,ygale/stackage,int-index/stackage,simonmichael/stackage,ethercrow/stackage,fimad/stackage,fpco/stackage,mrkkrp/stackage,brendanhay/stackage,judah/stackage,jaspervdj/stackage,spencerjanssen/stackage,alanz/stackage,phadej/stackage,iand675/stackage,mgajda/stackage,jonschoning/stackage,athanclark/stackage,lwm/stackage,soenkehahn/stackage,garetxe/stackage,peti/stackage,GregorySchwartz/stackage,DanielG/stackage,christiaanb/stackage,phaazon/stackage