remove redundant $ref: examples are allowed in "content" now too

Author: karenetheridge

src/schemas/validation/schema.yaml

@@ -783,7 +783,6 @@ $defs:
           allowReserved:
             default: false
             type: boolean
-        $ref: '#/$defs/examples'
     allOf:
     - $ref: '#/$defs/examples'
     - $ref: '#/$defs/specification-extensions'