Remove unused code for search input visibility toggling
Remove unused code for search input visibility toggling

Since the toggling of the visibility of the search input field is (very
elegantly) handled by CSS this commit removes some no longer needed
code.

matthewstyers/keystone,w01fgang/keystone,efernandesng/keystone,codevlabs/keystone,dryna/keystone-twoje-urodziny,dvdcastro/keystone,joerter/keystone,Yaska/keystone,pr1ntr/keystone,tony2cssc/keystone,andrewlinfoot/keystone,Ftonso/keystone,rafmsou/keystone,pswoodworth/keystone,webteckie/keystone,naustudio/keystone,brianjd/keystone,mikaoelitiana/keystone,Yaska/keystone,Adam14Four/keystone,Redmart/keystone,Pop-Code/keystone,concoursbyappointment/keystoneRedux,everisARQ/keystone,danielmahon/keystone,Redmart/keystone,codevlabs/keystone,wmertens/keystone,Adam14Four/keystone,ONode/keystone,rafmsou/keystone,frontyard/keystone,riyadhalnur/keystone,andrewlinfoot/keystone,creynders/keystone,trentmillar/keystone,suryagh/keystone,ratecity/keystone,michaelerobertsjr/keystone,naustudio/keystone,vokal/keystone,sendyhalim/keystone,tony2cssc/keystone,danielmahon/keystone,jstockwin/keystone,pr1ntr/keystone,benkroeger/keystone,benkroeger/keystone,vokal/keystone,frontyard/keystone,suryagh/keystone,ratecity/keystone,naustudio/keystone,Tangcuyu/keystone,dryna/keystone-twoje-urodziny,andreufirefly/keystone,linhanyang/keystone,alobodig/keystone,cermati/keystone,everisARQ/keystone,matthewstyers/keystone,jacargentina/keystone,matthewstyers/keystone,jacargentina/keystone,pswoodworth/keystone,matthieugayon/keystone,qwales1/keystone,qwales1/keystone,sendyhalim/keystone,michaelerobertsjr/keystone,snowkeeper/keystone,mikaoelitiana/keystone,trentmillar/keystone,trentmillar/keystone,xyzteam2016/keystone,joerter/keystone,Pop-Code/keystone,Yaska/keystone,Ftonso/keystone,cermati/keystone,snowkeeper/keystone,efernandesng/keystone,nickhsine/keystone,Tangcuyu/keystone,dvdcastro/keystone,andrewlinfoot/keystone,creynders/keystone,w01fgang/keystone,alobodig/keystone,webteckie/keystone,wmertens/keystone,ONode/keystone,danielmahon/keystone,jstockwin/keystone,xyzteam2016/keystone,benkroeger/keystone,matthieugayon/keystone,nickhsine/keystone,riyadhalnur/keystone,vokal/keystone,andreufirefly/keystone,concoursbyappointment/keystoneRedux,frontyard/keystone,brianjd/keystone