writerfilter: remove unused xmistat
writerfilter: remove unused xmistat

Change-Id: I9ac4cbea66123a58007dfce639964f546847a36f

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