Change the canonical way to include the C bindings headers to <mojo/bindings/*.h>.

mojo/public/c/bindings/BUILD.gn

Index: mojo/public/c/bindings/BUILD.gn
diff --git a/mojo/public/c/bindings/BUILD.gn b/mojo/public/c/bindings/BUILD.gn
deleted file mode 100644
index de2da899b34fca3dc006322edd470a3706916423..0000000000000000000000000000000000000000
--- a/mojo/public/c/bindings/BUILD.gn
+++ /dev/null
@@ -1,32 +0,0 @@
-# Copyright 2016 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.
-
-import("../../mojo_sdk.gni")
-
-mojo_sdk_source_set("bindings") {
-  sources = [
-    "array.h",
-    "buffer.h",
-    "interface.h",
-    "map.h",
-    "message.h",
-    "string.h",
-    "struct.h",
-    "union.h",
-    "validation.h",
-
-    # Implementation details.
-    "lib/array.c",
-    "lib/buffer.c",
-    "lib/map.c",
-    "lib/message.c",
-    "lib/struct.c",
-    "lib/type_descriptor.c",
-    "lib/type_descriptor.h",
-    "lib/union.c",
-    "lib/util.h",
-  ]
-
-  mojo_sdk_public_deps = [ "mojo/public/c:system" ]
-}