Remove radicale.py script

The script installed by setuptools should be used instead.

MANIFEST.in

@@ -1,3 +1,3 @@
 include COPYING DOCUMENTATION.md NEWS.md README.md
 include config rights
-include radicale.py radicale.wsgi
+include radicale.wsgi

radicale.py

@@ -1,13 +0,0 @@
-#!/usr/bin/env python3
-
-"""
-Radicale CalDAV Server.
-
-Launch the server according to configuration and command-line options.
-
-"""
-
-import runpy
-
-if __name__ == "__main__":
-    runpy.run_module("radicale", run_name="__main__")