Revert "Clarify comment in gen_jarjar.py"

This reverts commit 7d92b8b30f.

Reason for revert: b/233081774

Change-Id: Ia9f12a7b4eeecacf615f8783f35295fab98fa924

tools/gen_jarjar.py

@@ -31,9 +31,7 @@ def parse_arguments(argv):
         '--jars', nargs='+',
         help='Path to pre-jarjar JAR. Can be followed by multiple space-separated paths.')
     parser.add_argument(
-        '--prefix', required=True,
-        help='Package prefix to use for jarjared classes, '
-             'for example "com.android.connectivity" (does not end with a dot).')
+        '--prefix', required=True, help='Package prefix to use for jarjared classes.')
     parser.add_argument(
         '--output', required=True, help='Path to output jarjar rules file.')
     parser.add_argument(