Bug 1437593 - Patch vendored pipenv to remove unused dependencies; r=ted

pipenv does not need requests[security] or ordereddict dependencies on Python 2.7 or later.

MozReview-Commit-ID: JH2BnZc1YPx

--HG--
extra : rebase_source : e9369df92e3bc17278e7684e1d1a4f95fdf79241

third_party/python/pipenv/setup.py

@@ -23,8 +23,8 @@ required = [
     'virtualenv-clone>=0.2.5',
     'virtualenv',
     'pathlib;python_version<"3.4"',
-    'requests[security];python_version<"3.0"',
+    'requests[security];python_version<"2.7"',
-    'ordereddict;python_version<"3.0"',
+    'ordereddict;python_version<"2.7"',
 ]