UNALIAS [alias1] [alias2] [alias3] [alias4] ...

* UNALIAS removes one or more  alias  definitions from the alias list.
* UNALIAS without arguments removes all aliases.

eg.     alias f1 "cd df0:;dir^M"
        alias f2 "cd df1:;dir^M"
        ...
        alias f10 "ed df1:s/startup-sequence^M"

        unalias f1 f2 f3 f4 f5 f6 f7 f8 f9
        ...
        unalias f10