One possible way would be to use token identifiers again This is slightly more precise than a simple $remove, as tokens identifiers work "word"- (token separator-) sensitive...
Code:
var %text = $did(2).seltext, %remove = +fs
while ($findtok(%text,%remove,1,32)) { var %text = $deltok(%text,$v1,32) }
echo -a Removed %remove from $did(2).seltext : %text
