Remove /usr/lib/pulp/plugins/types/deb.json from setup.py

This legacy file will prevent migration 0004 from working.

WARNING: This will also require removing the file from the .spec file in
pulp-packaging repository!

fixes #4951
https://pulp.plan.io/issues/4951

plugins/setup.py

@@ -28,7 +28,6 @@
     include_package_data=True,
     data_files=[
         ('/etc/httpd/conf.d', ['etc/httpd/conf.d/pulp_deb.conf']),
-        ('/usr/lib/pulp/plugins/types', ['types/deb.json']),
     ],
     install_requires=[
         'python-gnupg',