Issue #2226 - Assigning wrong color profile results in error reporting dialog

image_profile_assign_callback(): forgot to remove some code when
introducing gimp_image_assign_color_profile().

app/actions/image-commands.c

@@ -1247,9 +1247,6 @@ image_profile_assign_callback (GtkWidget                *dialog,
                     "%s", error->message);
       g_clear_error (&error);
 
-      gimp_image_undo_group_end (image);
-      gimp_image_undo (image);
-
       return;
     }