Revert "Re-revert "awscli: Get rid of runtime -dev dependencies""

This reverts commit a1eacb900e.

Adding dev outputs to python packages means they can't be included in
a Python environment created with python3.withPackages, because
makePythonPath will include the dev output, which is empty apart from
nix-support, rather than the out output, which contains all the Python
code.

pkgs/tools/admin/awscli/default.nix

@@ -57,9 +57,6 @@ in py.pkgs.buildPythonApplication rec {
     pyyaml
     groff
     less
-    urllib3
-    dateutil
-    jmespath
   ];
 
   postInstall = ''