pythonPackages: deprecate scikitlearn alias

pkgs/top-level/python-aliases.nix

@@ -62,6 +62,7 @@ mapAliases ({
   qasm2image = throw "qasm2image is no longer maintained (since November 2018), and is not compatible with the latest pythonPackages.qiskit versions."; # added 2020-12-09
   requests_toolbelt = requests-toolbelt; # added 2017-09-26
   rotate-backups = throw "pythonPackages.rotate-backups was removed in favor of the top-level rotate-backups"; # added 2021-07-01
+  scikitlearn = scikit-learn; # added 2021-07-21
   selectors34 = throw "selectors34 has been removed: functionality provided by Python itself; archived by upstream."; # Added 2021-06-10
   setuptools_scm = setuptools-scm; # added 2021-06-03
   smart_open = smart-open; # added 2021-03-14

pkgs/top-level/python-packages.nix

@@ -7804,8 +7804,6 @@ in {
     inherit (pkgs) gfortran glibcLocales;
   };
 
-  scikitlearn = self.scikit-learn;
-
   scikit-optimize = callPackage ../development/python-modules/scikit-optimize { };
 
   scikits-odes = callPackage ../development/python-modules/scikits-odes { };