Revert "python-requests2: use system-wide CA bundle"

This reverts commit 768c970c8d.
Moved to staging, as it causes ~16k rebuilds.

pkgs/development/python-modules/requests/0001-requests-certs.py-use-system-wide-cert-bundle-from-N.patch

@@ -1,43 +0,0 @@
-From f04105df552309880ede3176c48930762843ea8d Mon Sep 17 00:00:00 2001
-From: Peter Simons <simons@cryp.to>
-Date: Thu, 9 Feb 2017 15:06:36 +0100
-Subject: [PATCH] requests/certs.py: use system-wide cert bundle from NixOS
- rather than our own
-
----
- requests/certs.py | 17 ++++-------------
- 1 file changed, 4 insertions(+), 13 deletions(-)
-
-diff --git a/requests/certs.py b/requests/certs.py
-index f922b99d..0209ecc2 100644
---- a/requests/certs.py
-+++ b/requests/certs.py
-@@ -5,21 +5,12 @@
- requests.certs
- ~~~~~~~~~~~~~~
- 
--This module returns the preferred default CA certificate bundle.
--
--If you are packaging Requests, e.g., for a Linux distribution or a managed
--environment, you can change the definition of where() to return a separately
--packaged CA bundle.
-+This module returns the preferred default CA certificate bundle (for NixOS).
- """
--import os.path
- 
--try:
--    from certifi import where
--except ImportError:
--    def where():
--        """Return the preferred certificate bundle."""
--        # vendored bundle inside Requests
--        return os.path.join(os.path.dirname(__file__), 'cacert.pem')
-+def where():
-+    """Return the preferred certificate bundle."""
-+    return "/etc/ssl/certs/ca-certificates.crt"
- 
- if __name__ == '__main__':
-     print(where())
--- 
-2.11.1
-

pkgs/top-level/python-packages.nix

@@ -22082,6 +22082,7 @@ in {
     };
   };
 
+
   requests = buildPythonPackage rec {
     name = "requests-1.2.3";
     disabled = !pythonOlder "3.4";
@@ -22097,6 +22098,7 @@ in {
     };
   };
 
+
   requests2 = buildPythonPackage rec {
     name = "requests-${version}";
     version = "2.13.0";
@@ -22106,8 +22108,6 @@ in {
       sha256 = "5722cd09762faa01276230270ff16af7acf7c5c45d623868d9ba116f15791ce8";
     };
 
-    patches = [../development/python-modules/requests/0001-requests-certs.py-use-system-wide-cert-bundle-from-N.patch];
-
     nativeBuildInputs = [ self.pytest ];
     # sadly, tests require networking
     doCheck = false;