Fix KernelEquivalence.entityEquivalence for equi-named instance/top-level members

pkg/compiler/lib/src/kernel/element_map.dart

Index: pkg/compiler/lib/src/kernel/element_map.dart
diff --git a/pkg/compiler/lib/src/kernel/element_map.dart b/pkg/compiler/lib/src/kernel/element_map.dart
index 025838bb6b0f89d2866b8b14aa027487c1e65620..28c376ba3d9d8fca847a833b6189d65ef393140b 100644
--- a/pkg/compiler/lib/src/kernel/element_map.dart
+++ b/pkg/compiler/lib/src/kernel/element_map.dart
@@ -1250,25 +1250,6 @@ class WorldDeconstructionForTesting {
 
   WorldDeconstructionForTesting(this.builder);
 
-  KLibrary _getLibrary<E>(E member, Map<ir.Member, E> map) {
-    ir.Library library;
-    map.forEach((ir.Member node, E other) {
-      if (library == null && member == other) {
-        library = node.enclosingLibrary;
-      }
-    });
-    if (library == null) {
-      throw new ArgumentError("No library found for $member");
-    }
-    return builder._getLibrary(library);
-  }
-
-  KLibrary getLibraryForFunction(KFunction function) =>
-      _getLibrary(function, builder._methodMap);
-
-  KLibrary getLibraryForField(KField field) =>
-      _getLibrary(field, builder._fieldMap);
-
   KClass getSuperclassForClass(KClass cls) {
     _KClassEnv env = builder._classEnvs[cls.classIndex];
     ir.Supertype supertype = env.cls.supertype;