To remove sane or xsane:

if sane is installed in /usr/:
	rm -rf /usr/lib/sane
	rm -rf /usr/lib/libsane*
	rm -rf /usr/include/sane
	rm -rf /usr/etc/sane.d
	rm -rf /usr/share/sane*
	rm -rf /usr/bin/scanimage
	rm -rf /usr/bin/xscanimage

if sane is installed in /usr/local/:
	rm -rf /usr/local/lib/sane
	rm -rf /usr/local/lib/libsane*
	rm -rf /usr/local/include/sane
	rm -rf /usr/local/etc/sane.d
	rm -rf /usr/local/share/sane*
	rm -rf /usr/local/bin/scanimage
	rm -rf /usr/local/bin/xscanimage


For xsane in /usr:
	rm -rf /usr/bin/xsane
	rm -rf /usr/share/sane/xsane

For xsane in /usr/local
	rm -rf /usr/local/bin/xsane
	rm -rf /usr/local/share/sane/xsane

xsane also installs translation tables for different languages,
the path is different on different systems, but
find / -name "xsane.mo"
should list the directories and in these directories
there also could be sane-umax.mo and sane-pnm.mo

Oliver Rauch