Remove redundant background-image calls to prevent sprite flickering.
Remove redundant background-image calls to prevent sprite flickering.

erengy/hummingbird,NuckChorris/hummingbird,erengy/hummingbird,jcoady9/hummingbird,Snitzle/hummingbird,erengy/hummingbird,MiLk/hummingbird,qgustavor/hummingbird,NuckChorris/hummingbird,sidaga/hummingbird,xhocquet/hummingbird,saintsantos/hummingbird,sidaga/hummingbird,synthtech/hummingbird,erengy/hummingbird,wlads/hummingbird,xhocquet/hummingbird,hummingbird-me/hummingbird,wlads/hummingbird,NuckChorris/hummingbird,xhocquet/hummingbird,hummingbird-me/hummingbird,MiLk/hummingbird,astraldragon/hummingbird,Snitzle/hummingbird,wlads/hummingbird,Snitzle/hummingbird,xhocquet/hummingbird,paladique/hummingbird,vevix/hummingbird,wlads/hummingbird,sidaga/hummingbird,astraldragon/hummingbird,MiLk/hummingbird,xhocquet/hummingbird,MiLk/hummingbird,vevix/hummingbird,xhocquet/hummingbird,NuckChorris/hummingbird,paladique/hummingbird,qgustavor/hummingbird,astraldragon/hummingbird,saintsantos/hummingbird,vevix/hummingbird,vevix/hummingbird,Snitzle/hummingbird,saintsantos/hummingbird,qgustavor/hummingbird,paladique/hummingbird,synthtech/hummingbird,jcoady9/hummingbird,saintsantos/hummingbird,jcoady9/hummingbird,cybrox/hummingbird,astraldragon/hummingbird,xhocquet/hummingbird,paladique/hummingbird,sidaga/hummingbird,qgustavor/hummingbird,jcoady9/hummingbird