Bug 1557079 - Remove install_dep from wptrunner setup.py file, r=gsnedders

This was reading the confguration from requriements.txt which only
works in the simple case where that's a list of package names. In
practice the only thing that cares about this file is tox and it already
installs the requirements files directly.

Differential Revision: https://phabricator.services.mozilla.com/D33812

--HG--
extra : moz-landing-system : lando

testing/web-platform/tests/tools/wptrunner/setup.py

@@ -57,7 +57,6 @@ setup(name=PACKAGE_NAME,
                                   "prefs/*"]},
       include_package_data=True,
       data_files=[("requirements", requirements_files)],
-      install_requires=deps
       )
 
 if "install" in sys.argv: