removed redundant apply-plugin from 'build.gradle'
removed redundant apply-plugin from 'build.gradle'

aya-eiya/gretty,akhikhl/gretty,akhikhl/gretty,akhikhl/gretty,cwardgar/gretty,cwardgar/gretty,WilliamRen/gretty,saladinkzn/gretty,cwardgar/gretty