diff --git a/core/config/schema/core.entity.schema.yml b/core/config/schema/core.entity.schema.yml
index 71b7ccd..8d15f70 100644
--- a/core/config/schema/core.entity.schema.yml
+++ b/core/config/schema/core.entity.schema.yml
@@ -252,19 +252,6 @@ field.formatter.settings.boolean:
       type: string
       label: 'Custom output for TRUE'
 
-field.formatter.settings.boolean:
-  type: mapping
-  mapping:
-    format:
-      type: string
-      label: 'Output format'
-    format_custom_false:
-      type: string
-      label: 'Custom output for FALSE'
-    format_custom_true:
-      type: string
-      label: 'Custom output for TRUE'
-
 field.formatter.settings.string:
   type: mapping
   mapping: