image: don't print redundant error

This error is printed by load_image() now

Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
diff --git a/clients/image.c b/clients/image.c
index 573117c..aee8112 100644
--- a/clients/image.c
+++ b/clients/image.c
@@ -373,7 +373,6 @@
 	image->image = load_cairo_surface(filename);
 
 	if (!image->image) {
-		fprintf(stderr, "could not find the image %s!\n", b);
 		free(image->filename);
 		free(image);
 		return NULL;