dart2js cps: Streamline expressions and primitives.

pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library dart2js.ir_builder_task;
 
 import '../closure.dart' as closurelib;
 import '../closure.dart' hide ClosureScope;
 import '../constants/expressions.dart';
 import '../dart_types.dart';
@@ skipping 3376 matching lines @@
   }
 
   processLetHandler(ir.LetHandler node) {
     node.body = replacementFor(node.body);
   }
 
   processLetMutable(ir.LetMutable node) {
     node.body = replacementFor(node.body);
   }
 
-  processSetMutableVariable(ir.SetMutableVariable node) {
-    node.body = replacementFor(node.body);
-  }
-
-  processSetField(ir.SetField node) {
-    node.body = replacementFor(node.body);
-  }
-
-  processSetStatic(ir.SetStatic node) {
-    node.body = replacementFor(node.body);
-  }
-
   processContinuation(ir.Continuation node) {
     node.body = replacementFor(node.body);
   }
 }