Revert "Adjusts dart2js SSA builder to tolerate method type arguments."

pkg/compiler/lib/src/ssa/builder.dart

Index: pkg/compiler/lib/src/ssa/builder.dart
diff --git a/pkg/compiler/lib/src/ssa/builder.dart b/pkg/compiler/lib/src/ssa/builder.dart
index 222d7e37d9088db81950a9b7a7420a4bb4d8c7e5..50db1bf00553b3735936d472965f8e9013c595b7 100644
--- a/pkg/compiler/lib/src/ssa/builder.dart
+++ b/pkg/compiler/lib/src/ssa/builder.dart
@@ -4766,17 +4766,6 @@ class SsaBuilder extends ast.Visitor
       // The type variable is stored on the object.
       return readTypeVariable(member.enclosingClass, type.element,
           sourceInformation: sourceInformation);
-    } else if (type is MethodTypeVariableType) {
-      // TODO(eernst): The enclosing `else if` was added to provide minimal
-      // support for generic methods: The method type arguments are always
-      // pretending to have the value `dynamic`. Revise for full support.
-      DynamicType type = const DynamicType();
-      JavaScriptBackend backend = compiler.backend;
-      ClassElement cls = backend.helpers.DynamicRuntimeType;
-      HInstruction instruction =
-          new HDynamicType(type, new TypeMask.exact(cls, compiler.world));
-      add(instruction);
-      return instruction;
     } else {
       reporter.internalError(
           type.element, 'Unexpected type variable in static context.');