writerfilter: remove unused DffOPTHandler in doctok
writerfilter: remove unused DffOPTHandler in doctok

Change-Id: Ie067a77b7d61f59117826ab21c979688c1e3c2df

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core