Revert "NoSuchMethod on different super accesses/invocations handled."

sdk/lib/_internal/compiler/implementation/elements/elements.dart

Index: sdk/lib/_internal/compiler/implementation/elements/elements.dart
diff --git a/sdk/lib/_internal/compiler/implementation/elements/elements.dart b/sdk/lib/_internal/compiler/implementation/elements/elements.dart
index 01b8a5541e6b7b7ffa10da3f726ff807e3964c8a..b237d7bf217301f9fad6bf78179da53f37eaf13b 100644
--- a/sdk/lib/_internal/compiler/implementation/elements/elements.dart
+++ b/sdk/lib/_internal/compiler/implementation/elements/elements.dart
@@ -1867,25 +1867,6 @@ class Elements {
     return isLocal(element);
   }
 
-  /**
-   * Returns [:true:] if [element] represents an entity that can be used as the
-   * left-hand side of an assignment. For example a non-final field, a setter,
-   * or an abstract field with a setter.
-   */
-  static bool isAssignable(Element element) {
-    if (element == null) return false;
-    if (element.isField()) {
-      return !element.modifiers.isFinalOrConst();
-    } else if (element.isAbstractField()) {
-      AbstractFieldElement abstractFieldElement = element;
-      return abstractFieldElement.setter != null;
-    } else if (element.isSetter()) {
-      return true;
-    }
-    return false;
-  }
-
-
   static SourceString constructConstructorName(SourceString receiver,
                                                SourceString selector) {
     String r = receiver.slowToString();