Revert "Add gsutil 4.13 to telemetry/third_party"

tools/telemetry/third_party/gsutil/third_party/rsa/doc/installation.rst

Index: tools/telemetry/third_party/gsutil/third_party/rsa/doc/installation.rst
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-Installation
-==================================================
-
-Installation can be done in various ways. The simplest form uses pip
-or easy_install. Either one will work::
-
-    pip install rsa
-    easy_install rsa
-
-Depending on your system you may need to use ``sudo pip`` or ``sudo
-easy_install``.
-
-Installation from source is also quite easy. Download the source and
-then type::
-
-    python setup.py install
-
-or if that doesn't work::
-
-    sudo python setup.py install
-
-
-The sources are tracked in our `Mercurial repository`_ at
-bitbucket.org. It also hosts the `issue tracker`_.
-
-.. _`Mercurial repository`: https://bitbucket.org/sybren/python-rsa
-.. _`issue tracker`:
-    https://bitbucket.org/sybren/python-rsa/issues?status=new&status=open
-
-
-Dependencies
---------------------------------------------------
-
-Python-RSA has very few dependencies. As a matter of fact, to use it
-you only need Python itself. Loading and saving keys does require an
-extra module, though: pyasn1. If you used pip or easy_install like
-described above, you should be ready to go.
-
-
-Development dependencies
---------------------------------------------------
-
-In order to start developing on Python-RSA you need a bit more. Use
-pip to install the development requirements in a virtual environment
-for Python 2.x::
-
-    virtualenv python-rsa-venv-py2x
-    . python-rsa-venv-py2x/bin/activate
-    pip install -r python-rsa/requirements-dev-py2x.txt
-
-or Python 3.x::
-
-    virtualenv python-rsa-venv-py3x
-    . python-rsa-venv-py3x/bin/activate
-    pip install -r python-rsa/requirements-dev-py3x.txt
-
-Once these are installed, use Mercurial_ to get a copy of the source::
-
-    hg clone https://bitbucket.org/sybren/python-rsa
-    python setup.py develop
-
-.. _Mercurial: http://hg-scm.com/