remove orphaned error handler reference
remove orphaned error handler reference

joeybaker/react-image-gallery,tjaensch/waltythedachshund,ryanmargheriti/react-image-gallery,joeybaker/react-image-gallery,linxtion/react-image-gallery,jwdotjs/react-image-gallery,antonioyon/react-image-gallery,joeybaker/react-image-gallery,haahtela/react-image-gallery,ryanmargheriti/react-image-gallery,linxtion/react-image-gallery,tjaensch/waltythedachshund,xiaolin/react-image-gallery,xiaolin/react-image-gallery,haahtela/react-image-gallery,etshi/react-image-gallery,antonioyon/react-image-gallery,jwdotjs/react-image-gallery,etshi/react-image-gallery