appliance/postgresql: Remove some dead follower code
appliance/postgresql: Remove some dead follower code

Follow-up to b95e7ad5.

Remove code that references discoverd and is unused after disabling
the follower code. This will make landing discoverd2 easier.

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

jzila/flynn,flynn/flynn,kgrz/flynn,shads196770/flynn,TribeMedia/flynn,philiplb/flynn,flynn/flynn,justintung/flynn,lmars/flynn,arekkas/flynn,shads196770/flynn,tonicbupt/flynn,shads196770/flynn,justintung/flynn,pkdevbox/flynn,tonicbupt/flynn,flynn/flynn,felixrieseberg/flynn,benbjohnson/flynn,ozum/flynn,clifff/flynn,schatt/flynn,flynn/flynn,supermario/flynn,jzila/flynn,rikur/flynn,schatt/flynn,benbjohnson/flynn,josephglanville/flynn,tonicbupt/flynn,clifff/flynn,GrimDerp/flynn,justintung/flynn,kgrz/flynn,supermario/flynn,technosophos/flynn,technosophos/flynn,jzila/flynn,ozum/flynn,technosophos/flynn,technosophos/flynn,felixrieseberg/flynn,arekkas/flynn,benbjohnson/flynn,rikur/flynn,Brandywine2161/flynn,rikur/flynn,whouses/flynn,tonicbupt/flynn,clifff/flynn,shads196770/flynn,pkdevbox/flynn,supermario/flynn,josephglanville/flynn,felixrieseberg/flynn,kgrz/flynn,schatt/flynn,benbjohnson/flynn,whouses/flynn,benbjohnson/flynn,TribeMedia/flynn,Brandywine2161/flynn,whouses/flynn,shads196770/flynn,josephglanville/flynn,josephglanville/flynn,TribeMedia/flynn,Brandywine2161/flynn,kgrz/flynn,ozum/flynn,lmars/flynn,Brandywine2161/flynn,jzila/flynn,jzila/flynn,pkdevbox/flynn,rikur/flynn,Brandywine2161/flynn,justintung/flynn,flynn/flynn,schatt/flynn,supermario/flynn,arekkas/flynn,ozum/flynn,felixrieseberg/flynn,clifff/flynn,arekkas/flynn,whouses/flynn,kgrz/flynn,technosophos/flynn,lmars/flynn,TribeMedia/flynn,GrimDerp/flynn,philiplb/flynn,supermario/flynn,josephglanville/flynn,TribeMedia/flynn,lmars/flynn,justintung/flynn,justintung/flynn,ozum/flynn,whouses/flynn,ozum/flynn,rikur/flynn,schatt/flynn,kgrz/flynn,GrimDerp/flynn,arekkas/flynn,whouses/flynn,supermario/flynn,pkdevbox/flynn,clifff/flynn,clifff/flynn,philiplb/flynn,jzila/flynn,GrimDerp/flynn,philiplb/flynn,felixrieseberg/flynn,josephglanville/flynn,pkdevbox/flynn,benbjohnson/flynn,lmars/flynn,tonicbupt/flynn,shads196770/flynn,GrimDerp/flynn,philiplb/flynn,schatt/flynn,GrimDerp/flynn,TribeMedia/flynn,pkdevbox/flynn,Brandywine2161/flynn,rikur/flynn