Issue #3411200 by sijumpk: Deprecated sequence type schema definition

config/schema/taxonomy_entity_index.schema.yml

@@ -6,8 +6,8 @@ taxonomy_entity_index.settings:
       type: sequence
       label: 'Types'
       sequence:
-        - type: string
-          label: 'Content type machine name'
+        type: string
+        label: 'Content type machine name'
     index_revisions:
       type: boolean
       label: 'Index revisions'