Simplfy DEPS: always pull all deps, remove unused barelinux platform.

platform_tools/barelinux/bin/arm64_make

-#!/bin/sh
-
-# Copyright 2014 Google Inc.
-#
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-set -e  # When any command fails, the shell will immediately exit.
-
-usage() {
-    cat >&2 <<EOF
-arm64_make - this script builds a AArch64 version of skia that
-does not depend on external libraries, perfect for putting in an
-embedded system running Linux.
-
-Assumes that you have already run the download_deps script.
-
-Usage:
-  $0 \\
-    [-o SKIA_OUT_DIR] [-c CC_EXE] [-x CXX_EXE] \\
-    [-t Debug | Release | Coverage | Release_Developer] \\
-
-Example use:
-  $0 \\
-    -o ~/build/skia/arg64gcc \\
-    -c ~/local/arm64/bin/aarch64-linux-gnu-gcc \\
-    -x ~/local/arm64/bin/aarch64-linux-gnu-g++ \\
-EOF
-    return 1
-}
-
-# BUILD_TYPE should be one of:
-#  Coverage, Debug, Release, or Release_Developer
-BUILD_TYPE='Debug'
-
-while getopts ":c:x:o:t:h" opt ; do
-    case $opt in
-        c)  export CC="$OPTARG" ;;
-        x)  export CXX="$OPTARG" ;;
-        o)  export SKIA_OUT="$OPTARG";;
-        t)  BUILD_TYPE="$OPTARG";;
-        h)  usage || exit;;
-        ?)  echo "unknown option '$OPTARG'" >&2;
-            usage || exit;;
-    esac
-done
-OPTIND=1  # Reset this variable for calling barelinux_make with -t command flag.
-
-export GYP_DEFINES="${GYP_DEFINES} \
-    skia_gpu=0 \
-    skia_arch_type=arm64 \
-    "
-
-. "$(dirname "$0")/barelinux_make" -t "$BUILD_TYPE"
-