Remove comments from function/property implementation template

#KT-18539 Fixed

idea/testData/multiModuleQuickFix/addMissingActualMembers/classOverloadedFunction/jvm/My.kt.after

@@ -4,6 +4,6 @@
 actual class My {
     fun foo(param: String) = 42
     actual fun foo(param: Int): Int {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        TODO("Not yet implemented")
     }
 }