lib/imagery: fix SONAME missing (#2269)

* Update lib/imagery/Makefile: fix SONAME missing

Fixes #2268

Co-authored-by: Nicklas Larsson <n_larsson@yahoo.com>

lib/imagery/Makefile

@@ -7,7 +7,6 @@ EXTRA_CFLAGS = $(VECT_CFLAGS)
 
 include $(MODULE_TOPDIR)/include/Make/Lib.make
 include $(MODULE_TOPDIR)/include/Make/Doxygen.make
-include $(MODULE_TOPDIR)/include/Make/Grass.make
 
 # images
 IMGSRC := $(wildcard *.png) $(wildcard *.jpg) $(wildcard *.gif)