Remove unnecessary require in ImageHelper.
Remove unnecessary require in ImageHelper.

chrise86/refinerycms,refinery/refinerycms,stefanspicer/refinerycms,anitagraham/refinerycms,Eric-Guo/refinerycms,gwagener/refinerycms,louim/refinerycms,mabras/refinerycms,gwagener/refinerycms,mabras/refinerycms,johanb/refinerycms,Eric-Guo/refinerycms,trevornez/refinerycms,anitagraham/refinerycms,chrise86/refinerycms,simi/refinerycms,kelkoo-services/refinerycms,mabras/refinerycms,kappiah/refinerycms,anitagraham/refinerycms,trevornez/refinerycms,LytayTOUCH/refinerycms,refinery/refinerycms,simi/refinerycms,bryanmtl/g-refinerycms,mkaplan9/refinerycms,KingLemuel/refinerycms,simi/refinerycms,aguzubiaga/refinerycms,hoopla-software/refinerycms,louim/refinerycms,Retimont/refinerycms,johanb/refinerycms,sideci-sample/sideci-sample-refinerycms,mkaplan9/refinerycms,gwagener/refinerycms,kappiah/refinerycms,sideci-sample/sideci-sample-refinerycms,mkaplan9/refinerycms,mlinfoot/refinerycms,johanb/refinerycms,refinery/refinerycms,mobilityhouse/refinerycms,simi/refinerycms,Eric-Guo/refinerycms,aguzubiaga/refinerycms,KingLemuel/refinerycms,hoopla-software/refinerycms,mlinfoot/refinerycms,LytayTOUCH/refinerycms,mojarra/myrefinerycms,KingLemuel/refinerycms,bryanmtl/g-refinerycms,kelkoo-services/refinerycms,mojarra/myrefinerycms,mobilityhouse/refinerycms,Retimont/refinerycms,hoopla-software/refinerycms,Retimont/refinerycms,chrise86/refinerycms,bricesanchez/refinerycms,aguzubiaga/refinerycms,bricesanchez/refinerycms,mlinfoot/refinerycms,stefanspicer/refinerycms,stefanspicer/refinerycms,LytayTOUCH/refinerycms,trevornez/refinerycms,kappiah/refinerycms