Uninstall config_filter module

It is no longer used so we should remove it to reduce our amount of
third party modules we use.

web/modules/custom/dpl_update/dpl_update.install

@@ -319,3 +319,10 @@ function dpl_update_update_10026(): string {
 function dpl_update_update_10027(): string {
   return _dpl_update_install_modules(['simple_oauth']);
 }
+
+/**
+ * Uninstall config_filter.
+ */
+function dpl_update_update_10028(): string {
+  return _dpl_update_uninstall_modules(['config_filter']);
+}