remove unused vars & prevent submit via enter
remove unused vars & prevent submit via enter

projectkudu/SiteExtensionGallery,ScottShingler/NuGetGallery,ScottShingler/NuGetGallery,grenade/NuGetGallery_download-count-patch,skbkontur/NuGetGallery,grenade/NuGetGallery_download-count-patch,grenade/NuGetGallery_download-count-patch,mtian/SiteExtensionGallery,projectkudu/SiteExtensionGallery,skbkontur/NuGetGallery,ScottShingler/NuGetGallery,projectkudu/SiteExtensionGallery,mtian/SiteExtensionGallery,mtian/SiteExtensionGallery,skbkontur/NuGetGallery