librst: remove redundant sites.h header

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@49213 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/rst/interp_float/input2d.c

@@ -20,7 +20,6 @@
 
 #include <grass/gis.h>
 #include <grass/raster.h>
-#include <grass/site.h>
 #include <grass/bitmap.h>
 #include <grass/linkm.h>
 #include <grass/interpf.h>