Remove all unused variables.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/android.py

 # Copyright (C) 2012 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 205 matching lines @@
         return self.run(['pull', device_path, host_path], ignore_error=ignore_error)
 
     def mkdir(self, device_path, chmod=None):
         self.run(['shell', 'mkdir', '-p', device_path])
         if chmod:
             self.run(['shell', 'chmod', chmod, device_path])
 
     def restart_adb(self):
         pids = self.extract_pids('adbd')
         if pids:
-            output = self.run(['shell', 'kill', '-' + str(signal.SIGTERM)] + pids)
+            self.run(['shell', 'kill', '-' + str(signal.SIGTERM)] + pids)
         self.run(['wait-for-device'])
 
     def restart_as_root(self):
         output = self.run(['root'])
         if 'adbd is already running as root' in output:
             return
 
         elif not 'restarting adbd as root' in output:
             self._log_error('Unrecognized output from adb root: %s' % output)
 
@@ skipping 743 matching lines @@
         self._android_commands.run(['uninstall', self._driver_details.package_name()])
         driver_host_path = self._port._path_to_driver()
         log_callback("installing apk")
         install_result = self._android_commands.run(['install', driver_host_path])
         if 'Success' not in install_result:
             self._abort('Failed to install %s onto device: %s' % (driver_host_path, install_result))
 
     def _push_fonts(self, log_callback):
         path_to_ahem_font = self._port._build_path('AHEM____.TTF')
         self._push_file_if_needed(path_to_ahem_font, self._driver_details.device_fonts_directory() + 'AHEM____.TTF', log_callback)
-        for (host_dirs, font_file, package) in HOST_FONT_FILES:
+        for (host_dirs, font_file, _) in HOST_FONT_FILES:
             for host_dir in host_dirs:
                 host_font_path = host_dir + font_file
                 if self._port._check_file_exists(host_font_path, '', more_logging=False):
                     self._push_file_if_needed(
                         host_font_path, self._driver_details.device_fonts_directory() + font_file, log_callback)
 
     def _push_test_resources(self, log_callback):
         for resource in TEST_RESOURCES_TO_PUSH:
             self._push_file_if_needed(self._port.layout_tests_dir() + '/' + resource,
                                       DEVICE_LAYOUT_TESTS_DIR + resource, log_callback)
@@ skipping 305 matching lines @@
         return command
 
     def _read_prompt(self, deadline):
         last_char = ''
         while True:
             current_char = self._server_process.read_stdout(deadline, 1)
             if current_char == ' ':
                 if last_char in ('#', '$'):
                     return
             last_char = current_char