writerfilter: these SPRM's are unused

Change-Id: I8704011ea70a8ee37c261078f42660c1bbc55d9a
writerfilter: whitespace fixes in RtfFilter

Change-Id: Ic275ce70318d56010d40e483b299c8b1b13bf902
sw: hardcoded NS_sprm::LN_CPbiGrf

Change-Id: I2a63d1c937392be194c00909213bc89ffe26a550