Delete a bunch of dead python code.

sky/tools/webkitpy/tool/commands/abstractsequencedcommand.py

-# Copyright (C) 2010 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
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-import logging
-
-from webkitpy.common.system.executive import ScriptError
-from webkitpy.tool.commands.stepsequence import StepSequence
-from webkitpy.tool.multicommandtool import AbstractDeclarativeCommand
-
-_log = logging.getLogger(__name__)
-
-
-class AbstractSequencedCommand(AbstractDeclarativeCommand):
-    steps = None
-    def __init__(self):
-        self._sequence = StepSequence(self.steps)
-        AbstractDeclarativeCommand.__init__(self, self._sequence.options())
-
-    def _prepare_state(self, options, args, tool):
-        return None
-
-    def execute(self, options, args, tool):
-        try:
-            state = self._prepare_state(options, args, tool)
-        except ScriptError, e:
-            _log.error(e.message_with_output())
-            self._exit(e.exit_code or 2)
-
-        self._sequence.run_and_handle_errors(tool, options, state)