pythonPackages: deprecate pytestquickcheck alias

pkgs/top-level/python-aliases.nix

@@ -55,6 +55,7 @@ mapAliases ({
   pytestcov = pytest-cov; # added 2021-01-04
   pytest-pep8 = pytestpep8; # added 2021-01-04
   pytestpep8 = throw "pytestpep8 was removed because it is abandoned and no longer compatible with pytest v6.0"; # added 2020-12-10
+  pytestquickcheck = pytest-quickcheck; # added 2021-07-20
   pytestrunner = pytest-runner; # added 2021-01-04
   qasm2image = throw "qasm2image is no longer maintained (since November 2018), and is not compatible with the latest pythonPackages.qiskit versions."; # added 2020-12-09
   rotate-backups = throw "pythonPackages.rotate-backups was removed in favor of the top-level rotate-backups"; # added 2021-07-01

pkgs/top-level/python-packages.nix

@@ -6862,8 +6862,7 @@ in {
 
   pytest-qt = callPackage ../development/python-modules/pytest-qt { };
 
-  pytest-quickcheck = self.pytestquickcheck;
-  pytestquickcheck = callPackage ../development/python-modules/pytest-quickcheck { };
+  pytest-quickcheck = callPackage ../development/python-modules/pytest-quickcheck { };
 
   pytest-raises = callPackage ../development/python-modules/pytest-raises { };