let delete only be when user is permitted
let delete only be when user is permitted

concerning https://github.com/linnovate/mean/issues/1430
Peretus/test-mean,rjVapes/mean,jenavarro/AllRules,idhere703/meanSample,vikram-bagga/zummy,rpalacios/preach-lander,yosifgenchev/iPlayIt,rjVapes/mean,kevinzli/meanforms,tmrotz/brad,idhere703/meanSample,komarudin02/Public,GeminiLegend/myRelephant265,tmrotz/brad,bbayo4/Businness-Application-using-MEAN.IO-Stack,fkiller/harvard,fkiller/mean,NenadP/blocks,ascreven/mean.io,mstackpo/MattsMeanApp,bbayo4/Businness-Application-using-MEAN.IO-Stack,spacetag/TechEx_Josiah,Sharmaz/mean,Sharmaz/mean,spacetag/TechEx_Josiah,joshsilverman/me,VikramTiwari/mean,vikram-bagga/zummy,rachelleannmorales/meanApp,tmrotz/brad,jun-oka/bee-news-jp-client-1,rpalacios/preach-lander,ascreven/mean.io,wearska/mean-mono,fkiller/mean,yjkim1701/cmt-mgr,yosifgenchev/iPlayIt,kevinzli/meanforms,joshsilverman/me,jun-oka/bee-news-jp-client-1,fkiller/harvard,jenavarro/AllRules,yjkim1701/cmt-mgr,Peretus/test-mean,VikramTiwari/mean,rachelleannmorales/meanApp,mstackpo/MattsMeanApp,GeminiLegend/myRelephant265,wearska/mean-mono,komarudin02/Public,NenadP/blocks