Remove unused imports in webkitpy.

third_party/WebKit/Tools/Scripts/webkitpy/tool/multicommandtool_unittest.py

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-import sys
 import unittest
 
 from optparse import make_option
 
 from webkitpy.common.system.outputcapture import OutputCapture
 from webkitpy.tool.multicommandtool import MultiCommandTool, Command, TryAgain
 
 
 class TrivialCommand(Command):
     name = "trivial"
@@ skipping 124 matching lines @@
         self._assert_tool_main_outputs(tool, ["tool", "help", "--all-commands"], expected_all_commands_help)
         # Test that arguments can be passed before commands as well
         self._assert_tool_main_outputs(tool, ["tool", "--all-commands", "help"], expected_all_commands_help)
 
 
     def test_command_help(self):
         command_with_options = TrivialCommand(options=[make_option("--my_option")], long_help="LONG HELP")
         tool = TrivialTool(commands=[command_with_options])
         expected_subcommand_help = "trivial [options]   help text\n\nLONG HELP\n\nOptions:\n  --my_option=MY_OPTION\n\n"
         self._assert_tool_main_outputs(tool, ["tool", "help", "trivial"], expected_subcommand_help)