cc: Remove all blimp code from cc.

cc/proto/rectf.proto

Index: cc/proto/rectf.proto
diff --git a/cc/proto/rectf.proto b/cc/proto/rectf.proto
deleted file mode 100644
index 5bd56f1cb9f2d09c42146476d6b81165fa5da160..0000000000000000000000000000000000000000
--- a/cc/proto/rectf.proto
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-syntax = "proto2";
-
-import "pointf.proto";
-import "sizef.proto";
-
-option optimize_for = LITE_RUNTIME;
-
-package cc.proto;
-
-message RectF {
-  optional cc.proto.PointF origin = 1;
-  optional cc.proto.SizeF size = 2;
-}