Drop pixbuf format tests

We have our own loaders for the formats we
always want to support, so we don't need to
check for what gdk-pixbuf supports.

testsuite/gdk/meson.build

@@ -19,7 +19,6 @@ tests = [
   { 'name': 'glcontext' },
   { 'name': 'keysyms' },
   { 'name': 'memorytexture' },
-  { 'name': 'pixbuf' },
   { 'name': 'rectangle' },
   { 'name': 'rgba' },
   { 'name': 'seat' },

testsuite/gdk/pixbuf.c

@@ -1,42 +0,0 @@
-#include <gdk-pixbuf/gdk-pixbuf.h>
-
-static void
-test_format (gconstpointer d)
-{
-  const char *f = d;
-  GSList *formats;
-  gboolean found;
-
-  found = FALSE;
-
-  formats = gdk_pixbuf_get_formats ();
-
-  for (GSList *l = formats; l && !found; l = l->next)
-    {
-      GdkPixbufFormat *format = l->data;
-      char *name;
-
-      name = gdk_pixbuf_format_get_name (format);
-
-      if (strcmp (name, f) == 0)
-        found = TRUE;
-
-      g_free (name);
-    }
-
-  g_slist_free (formats);
-
-  g_assert_true (found);
-}
-
-
-int
-main (int argc, char *argv[])
-{
-  (g_test_init) (&argc, &argv, NULL);
-
-  g_test_add_data_func ("/pixbuf/format/png", "png", test_format);
-  g_test_add_data_func ("/pixbuf/format/jpeg", "jpeg", test_format);
-
-  return g_test_run ();
-}