pythonPackages.greenlet: 0.4.17 -> 1.0.0

Update greenlet to 1.0.0.

meinheld declares a dependency to greenlet <0.5, but according to [1]
and [2], there are no API or ABI changes leading to greenlet-1.0.0, so
it seems reasonable to drop the strict requirement.  This commit
uses substituteInPlace to patch setup.py since no upstream commit has
landed in the main branch yet.

Morehover, quoting [2]:

    Prior to greenlet 1.0 there were no semantic meanings attached to
    greenlet versions — API and ABI regularly changed from 0.4.x
    to 0.4.x+1, so their current pin doesn't make much sense anyway.

nix-review reveals few broken packages that are also broken in master.

[1] https://github.com/mopemope/meinheld/pull/123
[2] https://github.com/benoitc/gunicorn/issues/2541#issuecomment-800353993

pkgs/development/python-modules/greenlet/default.nix

@@ -8,21 +8,16 @@
 
 buildPythonPackage rec {
   pname = "greenlet";
-  version = "0.4.17";
+  version = "1.0.0";
   disabled = isPyPy;  # builtin for pypy
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0swdhrcq13bdszv3yz5645gi4ijbzmmhxpb6whcfg3d7d5f87n21";
+    sha256 = "1y6wbg9yhm9dw6m768n4yslp56h85pnxkk3drz6icn15g6f1d7ki";
   };
 
   propagatedBuildInputs = [ six ];
 
-  # see https://github.com/python-greenlet/greenlet/issues/85
-  preCheck = ''
-    rm tests/test_leaks.py
-  '';
-
   meta = {
     homepage = "https://pypi.python.org/pypi/greenlet";
     description = "Module for lightweight in-process concurrent programming";