Remove catkin_python_setup

Gets around:

> error: Multiple top-level packages discovered in a flat-layout: ['srv', 'msg', 'sample', 'action'].
       >
       > To avoid accidental inclusion of unwanted files or directories,
       > setuptools will not proceed with this build.
       >
       > If you are trying to create a single distribution with multiple packages
       > on purpose, you should not rely on automatic discovery.
       > Instead, consider the following options:
       >
       > 1. set up custom discovery (`find` directive with `include` or `exclude`)
       > 2. use a `src-layout`
       > 3. explicitly set `py_modules` or `packages` with a list of names
       >
       > To find more information, look for "package discovery" on setuptools docs.
       > CMake Error at catkin_generated/safe_execute_install.cmake:4 (message):
       >
       >   execute_process(/build/jsk_recognition-release-release-noetic-jsk_recognition_msgs-1.2.17-2/build/catkin_generated/python_distutils_install.sh)
       >   returned error code
       > Call Stack (most recent call first):
       >   cmake_install.cmake:46 (include)
       >
       >
       > make: *** [Makefile:100: install] Error 1

distros/distro-overlay.nix

@@ -66,9 +66,12 @@ let
     image-cb-detector = patchBoostSignals rosSuper.image-cb-detector;
 
     jsk-recognition-msgs = rosSuper.jsk-recognition-msgs.overrideAttrs ({
-      buildInputs ? [], ...
+      buildInputs ? [], postPatch ? "", ...
     }: {
       buildInputs = buildInputs ++ [ rosSuper.ros-environment ];
+      postPatch = ''
+        substituteInPlace CMakeLists.txt --replace "catkin_python_setup()" ""
+      '';
     });
 
     laser-cb-detector = patchBoostSignals rosSuper.laser-cb-detector;