Code cleanup: get rid of unnecessary !! / as, fake warning comments and issues

idea/idea-analysis/src/org/jetbrains/kotlin/idea/refactoring/fqName/fqNameUtil.kt

@@ -33,6 +33,7 @@ public fun PsiElement.getKotlinFqName(): FqName? {
     return when (element) {
         is PsiPackage -> FqName(element.getQualifiedName())
         is PsiClass -> element.getQualifiedName()?.let { FqName(it) }
+        // as is necessary because of unresolved ambiguity: KT-3996
         is PsiMember -> (element as PsiMember).getName()?.let { name ->
             val prefix = element.getContainingClass()?.getQualifiedName()
             FqName(if (prefix != null) "$prefix.$name" else name)