remove unused rendr_stitch options
remove unused rendr_stitch options

CristinaFoltea/rendr,kball/rendr,alexindigo/rendr,yhagio/rendr,rendrjs/rendr,modulexcite/rendr,is00hcw/rendr,0111001101111010/rendr,SNASW/rendr,sarchila/rendr,eGood/rendr0.5