[fuchsia] Remove unused exe_runner.py script.

Change-Id: I7d356012e6acb40b6305a43ed537796c313c1dd1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2050476
Auto-Submit: Wez <wez@chromium.org>
Reviewed-by: Michael Spang <spang@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741458}

build/fuchsia/exe_runner.py

-#!/usr/bin/env python
-#
-# Copyright 2018 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.
-
-"""Deploys and executes a packaged Fuchsia executable on a target."""
-
-import argparse
-import logging
-import sys
-
-from common_args import AddCommonArgs, ConfigureLogging, \
-                        GetDeploymentTargetForArgs
-from run_package import RunPackage, RunPackageArgs
-
-
-def main():
-  parser = argparse.ArgumentParser()
-  AddCommonArgs(parser)
-  parser.add_argument(
-      '--child-arg',
-      action='append',
-      help='Arguments for the executable.',
-      default=[])
-  parser.add_argument(
-      'child_args', nargs='*', help='Arguments for the executable.', default=[])
-  args = parser.parse_args()
-  ConfigureLogging(args)
-
-  with GetDeploymentTargetForArgs(args) as target:
-    target.Start()
-
-    child_args = args.child_arg + args.child_args
-    run_package_args = RunPackageArgs.FromCommonArgs(args)
-    returncode = RunPackage(args.output_directory, target, args.package,
-                            args.package_name, child_args, run_package_args)
-
-
-if __name__ == '__main__':
-  sys.exit(main())