redundant $ref reference

Author: Phil Sturgeon

versions/3.1.0.md

@@ -2286,8 +2286,6 @@ The following properties are taken from the JSON Schema definition but their def
 - description - [CommonMark syntax](http://spec.commonmark.org/) MAY be used for rich text representation.
 - format - See [Data Type Formats](#dataTypeFormat) for further details. While relying on JSON Schema's defined formats, the OAS offers a few additional predefined formats.
 
-Alternatively, any time a Schema Object can be used, a [Reference Object](#referenceObject) can be used in its place. This allows referencing definitions instead of defining them inline.
-
 In addition to the JSON Schema properties defined in the vocabularies defined in the JSON Schema Core and JSON Schema Validation specifications, any properties can be used from any vocabularies, or entirely arbitrary keywords. The OpenAPI Specification defines an additional vocabulary of keywords which MAY be used along with the JSON Schema vocabulary keywords for further schema description:
 
 ##### Fixed Fields