discoverd/client: Remove unused externalIP global variable
discoverd/client: Remove unused externalIP global variable

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

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