Bug 1155160 - Remove script for generating the vendor directory

We're no longer using the vendor directory & this script wasn't entirely
reliable anyway, so let's remove it. The virtualenv package can be
removed from dev.txt, since virtualenv is installed globally, and
nothing inside our virtualenv (which is where the packages in dev.txt
end up) needs a local installation of it.

bin/generate-vendor-lib.py

@@ -1,52 +0,0 @@
-#!/usr/bin/env python
-
-# This Source Code Form is subject to the terms of the Mozilla Public
-# License, v. 2.0. If a copy of the MPL was not distributed with this
-# file, you can obtain one at http://mozilla.org/MPL/2.0/.
-
-"""
-(Re)-generate the vendor library in ``vendor/`` from the requirements listed
-in ``requirements/checked-in.txt``.
-
-This script will destroy everything in ``vendor/`` and replace it! You've been
-warned.
-
-Requires virtualenv. (We have to make an empty virtualenv and run in that,
-because pip's --ignore-installed flag is buggy).
-
-"""
-import os
-import shutil
-import subprocess
-import tempfile
-
-from virtualenv import create_environment
-
-
-def generate_vendor_lib():
-    base = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-    target = os.path.join(base, "vendor")
-    reqs = os.path.join(base, "requirements", "checked-in.txt")
-
-    venv = tempfile.mkdtemp("-generate-vendor-lib")
-
-    try:
-        shutil.rmtree(target)
-        os.mkdir(target)
-        create_environment(venv, site_packages=False)
-        venv_python = os.path.join(venv, "bin", "python")
-        peep = os.path.join(base, "bin", "peep.py")
-
-        subprocess.check_call(
-            "{0} {1} install --no-deps -r {2} "
-            '--install-option="--install-purelib={3}" '
-            '--install-option="--install-data={3}"'.format(
-                venv_python, peep, reqs, target),
-            shell=True,
-        )
-    finally:
-        shutil.rmtree(venv)
-
-
-if __name__ == "__main__":
-    generate_vendor_lib()

requirements/dev.txt

@@ -19,10 +19,6 @@ responses==0.3.0
 # sha256: P8n8hnJTAsWCGUO4veTde4L6PRY2VeLhQHSbmhZgcYE
 django-extensions==1.5.1
 
-# in order to be able to run bin/generate-vendor-lib.py
-# sha256: _XeKxeX_6HCj-3fW2A6BguCl8_xA2R-DVwYQRLeERDU
-virtualenv==12.0.7
-
 #for celery auto-reloading
 # sha256: 58UqnzbO4nxdCTHs-SlZzQIjF7AJAb007wXs5KKlyxs
 pyinotify==0.9.5