writerfilter: drop unused rtf:{xst,LISTLEVEL,LFOData,F} tokens

Change-Id: I65bcbce63acc7ae510f7ccf4200bf175c11d6604
writerfilter: drop unused rtf:{ALTFONTNAME,XSZFFN,XSTZNAME,UPXSTART,UPX}

Change-Id: Ie4520c3ab722b639b055fc63bb76c060e6198a27
writerfilter: drop unused rtf:{sed,FCMPR,FNMPR,FCSEPX,FN} tokens

Change-Id: I6ad41627eeced6c24437bbd022b244bf91b162d0
writerfilter: drop unused rtf:{ICOFORE,ICOBACK,IPAT,shptxt} tokens

Change-Id: Ib228c985d0d276fccfa77b9c2dac3ba69522a05e