depot_tools: Remove third_party/gsutil

third_party/gsutil/README

-This directory contains the Python command line tool gsutil, which Google
-has released as open source, to demonstrate the Google Storage API and to
-provide a tool for manipulating data in the system.
-
-Prerequisites:
-
-Gsutil requires Python 2.6 or later.
-
-To install gsutil take the following steps:
-
-1. Pick a place where you want to install the software.  You can
-   install the code wherever you prefer; for brevity the instructions below
-   assume you want to install in $HOME/gsutil.
-
-2. To install gsutil on Linux/Unix or MacOS, open a shell window, change
-   directories to where you downloaded the gsutil.tar.gz file, and do this:
-   % tar xfz gsutil.tar.gz -C $HOME
-
-   Then add the following line to your $HOME/.bashrc shell initialization
-   file:
-       export PATH=${PATH}:$HOME/gsutil
-
-   The next time you start a shell you should be able to run gsutil from
-   the command line.
-
-3. To install gsutil on Windows, install cygwin (http://www.cygwin.com/),
-   with at least version 2.6.5 of Python. Once you have that, start a shell
-   and follow the Linux instructions above for unpacking and installing gsutil.
-
-4. The first time you try to run gsutil, it will detect that you have no
-   configuration file containing your credentials, interactively prompt you,
-   and create the file.  
-
-   After this you can use the tool.  Running gsutil with with no arguments
-   will print a help summary.
-
-For more information on installing and using gsutil, see
-<http://code.google.com/apis/storage/docs/gsutil.html>.