Delete a bunch of dead python code.

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

Index: sky/tools/webkitpy/tool/commands/prettydiff.py
diff --git a/sky/tools/webkitpy/tool/commands/prettydiff.py b/sky/tools/webkitpy/tool/commands/prettydiff.py
deleted file mode 100644
index 66a06a69eab02a149aa7733a515cbcb48178aa0f..0000000000000000000000000000000000000000
--- a/sky/tools/webkitpy/tool/commands/prettydiff.py
+++ /dev/null
@@ -1,39 +0,0 @@
-# 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.
-
-from webkitpy.tool.commands.abstractsequencedcommand import AbstractSequencedCommand
-from webkitpy.tool import steps
-
-
-class PrettyDiff(AbstractSequencedCommand):
-    name = "pretty-diff"
-    help_text = "Shows the pretty diff in the default browser"
-    show_in_main_help = True
-    steps = [
-        steps.ConfirmDiff,
-    ]