writerfilter: remove unused WW8FKPImpl in doctok

Change-Id: I8fea1b19e6f5b592764beb7178bc34ed318e364e
writerfilter: remove unused escher html/xsl in doctok

Change-Id: Idd556260161ebb10fbb736d088377b60e037368f
writerfilter: remove unused doctokLogger

Change-Id: I20f2edc94b4fd3c258815a4ccc006cba562631f1
writerfilter: remove unused xmitocpp in doctok

Change-Id: I68ad918cf9b2093350ef0ce5b82d51de1106d9f6