r.mfilter.fp no longer exists; don't try to build it

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@33134 15284696-431f-4ddb-bdfa-cd5b030d7da7

raster/Makefile

@@ -44,7 +44,6 @@ SUBDIRS = \
 	r.mapcalc \
 	r.median \
 	r.mfilter \
-	r.mfilter.fp \
 	r.mode \
 	r.neighbors \
 	r.null \