Removaed remainder of 6.x upgrade steps and unused code
Removaed remainder of 6.x upgrade steps and unused code

dnnsoftware/Dnn.Platform,nvisionative/Dnn.Platform,bdukes/Dnn.Platform,bdukes/Dnn.Platform,valadas/Dnn.Platform,valadas/Dnn.Platform,nvisionative/Dnn.Platform,bdukes/Dnn.Platform,nvisionative/Dnn.Platform,valadas/Dnn.Platform,mitchelsellers/Dnn.Platform,valadas/Dnn.Platform,mitchelsellers/Dnn.Platform,valadas/Dnn.Platform,dnnsoftware/Dnn.Platform,dnnsoftware/Dnn.Platform,mitchelsellers/Dnn.Platform,dnnsoftware/Dnn.Platform,mitchelsellers/Dnn.Platform,mitchelsellers/Dnn.Platform,dnnsoftware/Dnn.Platform,bdukes/Dnn.Platform