Revert "Added explicit --help option."

This reverts commit 1304be0718.

platypush/app.py

@@ -163,9 +163,7 @@ class Application:
         """
         from . import __version__
 
-        parser = argparse.ArgumentParser(
-            description='A general-purpose platform for automation'
-        )
+        parser = argparse.ArgumentParser()
 
         parser.add_argument(
             '--config',
@@ -176,15 +174,6 @@ class Application:
             help='Custom location for the configuration file',
         )
 
-        parser.add_argument(
-            '--help',
-            '-h',
-            dest='help',
-            required=False,
-            action='store_true',
-            help="Print this help and exit",
-        )
-
         parser.add_argument(
             '--version',
             dest='version',
@@ -271,15 +260,10 @@ class Application:
         )
 
         opts, _ = parser.parse_known_args(args)
-
         if opts.version:
             print(__version__)
             sys.exit(0)
 
-        if opts.help:
-            parser.print_help()
-            sys.exit(0)
-
         return cls(
             config_file=opts.config,
             pidfile=opts.pidfile,