Remove unused RPCMonitor struct
Remove unused RPCMonitor struct

hlandauf/boulder,lucasallan/boulder,mehmooda/boulder,lucasallan/boulder,sophie-h/boulder,benileo/boulder,hlandauf/boulder,postfix/boulder,r0ro/boulder,mehmooda/boulder,jfrazelle/boulder,jsha/boulder,KyleChamberlin/boulder,postfix/boulder,jcjones/boulder,bmw/boulder,KyleChamberlin/boulder,postfix/boulder,letsencrypt/boulder,jcjones/boulder,benileo/boulder,mehmooda/boulder,ibukanov/boulder,lucasallan/boulder,letsencrypt/boulder,r0ro/boulder,postfix/boulder,sophie-h/boulder,mehmooda/boulder,jfrazelle/boulder,ZCloud-Firstserver/boulder,KyleChamberlin/boulder,ibukanov/boulder,patf/boulder,bmw/boulder,jsha/boulder,hlandauf/boulder,benileo/boulder,jsha/boulder,mozmark/boulder,sophie-h/boulder,jcjones/boulder,ZCloud-Firstserver/boulder,patf/boulder,ZCloud-Firstserver/boulder,r0ro/boulder,bmw/boulder,mozmark/boulder,jfrazelle/boulder,jfrazelle/boulder,ibukanov/boulder,mozmark/boulder,letsencrypt/boulder,benileo/boulder,patf/boulder,jcjones/boulder,mozmark/boulder,ZCloud-Firstserver/boulder,r0ro/boulder,hlandauf/boulder,KyleChamberlin/boulder,patf/boulder