6.12.3 `remove_module'
----------------------

remove_module(NAME)
     :: $B%b%8%e!<%k(B NAME $B$r:o=|$9$k(B.

RETURN
     (1|0)

NAME
     $B%b%8%e!<%kL>(B

   * $B:o=|$K@.8y$9$l$P(B 1, $B<:GT$9$l$P(B 0 $B$rJV$9(B.

     [100] remove_module("gr");
     1

$B;2>H(B
     *Note $B%b%8%e!<%k(B::.

