Removed virtualenv from depot_tools

bootstrap/virtualenv/LICENSE.txt

Index: bootstrap/virtualenv/LICENSE.txt
diff --git a/bootstrap/virtualenv/LICENSE.txt b/bootstrap/virtualenv/LICENSE.txt
deleted file mode 100644
index 7e00d5d512c2ae4007cecfe093c47bb6ced071bb..0000000000000000000000000000000000000000
--- a/bootstrap/virtualenv/LICENSE.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-Copyright (c) 2007 Ian Bicking and Contributors
-Copyright (c) 2009 Ian Bicking, The Open Planning Project
-Copyright (c) 2011-2014 The virtualenv developers
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.