Remove Mojo GLES2 API

mojo/gles2/BUILD.gn

-# Copyright 2014 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.
-
-config("mojo_use_gles2") {
-  defines = [ "MOJO_USE_GLES2_IMPL" ]
-}
-
-config("gles2_use_mojo") {
-  defines = [ "GLES2_USE_MOJO" ]
-}
-
-component("gles2") {
-  output_name = "mojo_gles2_impl"
-  sources = [
-    "gles2_impl.cc",
-  ]
-
-  defines = [
-    "GL_GLEXT_PROTOTYPES",
-    "MOJO_GLES2_IMPLEMENTATION",
-  ]
-
-  configs += [
-    ":gles2_use_mojo",
-    ":mojo_use_gles2",
-  ]
-  public_configs = [
-    ":gles2_use_mojo",
-    "//third_party/khronos:khronos_headers",
-  ]
-  all_dependent_configs = [ ":mojo_use_gles2" ]
-
-  public_deps = [
-    "//mojo/public/c/gles2",
-  ]
-
-  deps = [
-    "//base",
-    "//base/third_party/dynamic_annotations",
-    "//components/mus/public/cpp",
-    "//gpu/command_buffer/client:gles2_interface",
-    "//mojo/public/c/system:for_component",
-  ]
-
-  include_dirs = [ ".." ]
-}