Remove MIPS support

build/toolchain/linux/BUILD.gn

 # Copyright 2013 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("//build/config/sysroot.gni")
 import("//build/toolchain/ccache.gni")
 import("//build/toolchain/clang.gni")
 import("//build/toolchain/gcc_toolchain.gni")
 import("//build/toolchain/goma.gni")
 
@@ skipping 108 matching lines @@
   readelf = "${prefix}readelf"
   nm = "${prefix}nm"
   ar = "${prefix}ar"
   ld = cxx
   strip = "${prefix}strip"
 
   toolchain_cpu = "x64"
   toolchain_os = "linux"
   is_clang = false
 }
-
-gcc_toolchain("mipsel") {
-  cc = "${compiler_prefix}${toolchain_prefix}gcc"
-  cxx = "${compiler_prefix}${toolchain_prefix}g++"
-  ar = "${toolchain_prefix}ar"
-  ld = cxx
-  readelf = "${toolchain_prefix}readelf"
-  nm = "${toolchain_prefix}nm"
-  strip = "${toolchain_prefix}strip"
-
-  toolchain_cpu = "${target_cpu}"
-  toolchain_os = "linux"
-  is_clang = is_clang
-}