Issue #3454784 by fgm: fixed filter schema failing validation

config/schema/url_replace_filter.schema.yml

 # Schema for the configuration files of the URL Replace Filter module.
 
-filter_settings.g2_automatic:
-  type: filter
-  label: 'G2 Automatic'
-  mapping:
-    stop_list:
-      type: sequence
-      label: 'Ignored entries'
-      sequence:
-        type: string
-
 filter_settings.url_replace_filter:
   type: mapping
   label: 'URL Replace Filter'