dart2js cps: Streamline expressions and primitives.

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

Index: pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
diff --git a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
index 3ecb2745ff0ca6199dc76d99e6324a4351623e6e..6471d01bcc9b2b5e120f56cc74373f73d6e02d05 100644
--- a/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
+++ b/pkg/compiler/lib/src/cps_ir/cps_ir_builder_task.dart
@@ -3394,18 +3394,6 @@ class CleanupPass extends ir.RecursiveVisitor {
     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);
   }