Removed Clutter and GdkPixbuf as a dependency

They are not used at all

configure.ac

@@ -36,8 +36,6 @@ AC_CHECK_LIB([m], [sqrt])
 AC_CHECK_LIB([m], [floor])
 PKG_PROG_PKG_CONFIG
 PKG_CHECK_MODULES([GTK], [gtk+-3.0])
-PKG_CHECK_MODULES([CLUTTERX11], [clutter-x11-1.0])
-PKG_CHECK_MODULES([PIXBUF], [gdk-pixbuf-2.0])
 AC_CONFIG_MACRO_DIR([m4])
 
 LIBSWE_LIBS='$(top_builddir)/swe/src/libswe-1.75.la'

src/Makefile.am

@@ -1,5 +1,5 @@
 bin_PROGRAMS = gradix
 
 gradix_SOURCES = gradix.c calculate.c
-gradix_LDADD = $(LIBSWE_LIBS) $(GTK_LIBS) $(CLUTTERX11_LIBS) $(PIXBUF_LIBS)
-gradix_CFLAGS = $(CFLAGS) $(GTK_CFLAGS) $(CLUTTERX11_CFLAGS) $(PIXBUF_CFLAGS) -Wall
+gradix_LDADD = $(LIBSWE_LIBS) $(GTK_LIBS)
+gradix_CFLAGS = $(CFLAGS) $(GTK_CFLAGS) -Wall

src/gradix.c

@@ -1,7 +1,7 @@
 #include <stdlib.h>
 #include <math.h>
 #include <cairo.h>
-#include <clutter/clutter.h>
+#include <glib.h>
 
 #include "calculate.h"
 
@@ -108,9 +108,6 @@ init_graphics(void)
 int
 main(int argc, char *argv[])
 {
-#if !CLUTTER_CHECK_VERSION(1, 3, 6)
-#error "You need Clutter >= 1.3.6 to compile this software"
-#endif
     int year = 1981,
         month = 3,
         day = 11,