removed useless parameter from hash chain matchfinder
removed useless parameter from hash chain matchfinder

used to be present for compatibility with binary tree matchfinder

unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso,unknownbrackets/maxcso