Remove undeveloped option

Author: Sparks29032

src/diffpy/morph/morphapp.py

@@ -106,12 +106,6 @@ def custom_error(self, msg):
         type="float",
         help="Maximum r-value to use for PDF comparisons.",
     )
-    parser.add_option(
-        "--rgrid",
-        dest="rgrid",
-        metavar="GRID",
-        help="Choose the to refine on. ",
-    )
     parser.add_option(
         "--tolerance",
         "-t",