pythonPackages.dateutil: move to python-aliases.nix

pkgs/top-level/python-aliases.nix

@@ -35,6 +35,7 @@ in
 mapAliases ({
   blockdiagcontrib-cisco = throw "blockdiagcontrib-cisco is not compatible with blockdiag 2.0.0 and has been removed."; # Added 2020-11-29
   bugseverywhere = throw "bugseverywhere has been removed: Abandoned by upstream."; # Added 2019-11-27
+  dateutil = python-dateutil; # added 2021-07-03
   detox = throw "detox is no longer maintained, and was broken since may 2019"; # added 2020-07-04
   dns = dnspython; # Alias for compatibility, 2017-12-10
   faulthandler = throw "faulthandler is built into ${python.executable}";

pkgs/top-level/python-packages.nix

@@ -6917,8 +6917,6 @@ in {
   python-daemon = callPackage ../development/python-modules/python-daemon { };
 
   python-dateutil = callPackage ../development/python-modules/dateutil { };
-  # Alias that we should deprecate
-  dateutil = self.python-dateutil;
 
   python-dbusmock = callPackage ../development/python-modules/python-dbusmock { };