remove vestigal AppData usage (as mentioned in #4358)

Author: vtjnash

contrib/windows/juliarc.jl

@@ -1,6 +1,4 @@
 let user_data_dir
     ENV["PATH"] = JULIA_HOME*";"*joinpath(JULIA_HOME,"..","Git","bin")*";"*ENV["PATH"]
-    haskey(ENV,"JULIA_EDITOR") || (ENV["JULIA_EDITOR"] = "start")
-    user_data_dir = abspath(ENV["AppData"],"julia")
-    isdir(user_data_dir) || mkdir(user_data_dir)
+    #haskey(ENV,"JULIA_EDITOR") || (ENV["JULIA_EDITOR"] = "start") #start is not a program, so this doesn't work
 end