Remove irrelevant print statement

This statement is only relevant in 2.8, but causes confusion in master.
I kept the 'default' label to prevent compiler warnings about unhandled
cases. The break is needed because there should be at least one statement
after 'default'.

source/blender/depsgraph/intern/builder/deg_builder_nodes.cc

@@ -300,7 +300,8 @@ void DepsgraphNodeBuilder::build_id(ID* id) {
 			build_movieclip((MovieClip *)id);
 			break;
 		default:
-			fprintf(stderr, "Unhandled ID %s\n", id->name);
+			/* fprintf(stderr, "Unhandled ID %s\n", id->name); */
+			break;
 	}
 }