Revert "Reapply "Implement new model for class members." and "Implement new model for interface mem…

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

Index: sdk/lib/_internal/compiler/implementation/elements/modelx.dart
diff --git a/sdk/lib/_internal/compiler/implementation/elements/modelx.dart b/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
index 6cdd1eb1b94398679b9a596f40d6fe9a94da5332..0aa0c277403d792bb7a6639af6e3f7ef8d4e5c09 100644
--- a/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
+++ b/sdk/lib/_internal/compiler/implementation/elements/modelx.dart
@@ -1767,7 +1767,6 @@ abstract class BaseClassElementX extends ElementX implements ClassElement {
   int resolutionState;
   bool get isResolved => resolutionState == STATE_DONE;
   bool isProxy = false;
-  bool hasIncompleteHierarchy = false;
 
   // backendMembers are members that have been added by the backend to simplify
   // compilation. They don't have any user-side counter-part.
@@ -1779,9 +1778,6 @@ abstract class BaseClassElementX extends ElementX implements ClassElement {
 
   int get hierarchyDepth => allSupertypesAndSelf.maxDepth;
 
-  Map<Name, Member> classMembers;
-  Map<Name, MemberSignature> interfaceMembers;
-
   BaseClassElementX(String name,
                     Element enclosing,
                     this.id,
@@ -2155,18 +2151,6 @@ abstract class BaseClassElementX extends ElementX implements ClassElement {
   void setNative(String name) {
     nativeTagInfo = name;
   }
-
-  Member lookupClassMember(Name name) => classMembers[name];
-
-  void forEachClassMember(f(Member member)) {
-    classMembers.forEach((_, member) => f(member));
-  }
-
-  MemberSignature lookupInterfaceMember(Name name) => interfaceMembers[name];
-
-  void forEachInterfaceMember(f(MemberSignature member)) {
-    interfaceMembers.forEach((_, member) => f(member));
-  }
 }
 
 abstract class ClassElementX extends BaseClassElementX {