Use cases: Remove superfluous paragraph from "Conventions and Terminology"

Author: awwright

jsonschema-use-cases.xml

@@ -64,12 +64,6 @@
         </section>
 
         <section title="Conventions and Terminology">
-            <t>
-                The terms "JSON", "JSON text", "JSON value", "member", "element", "object", "array",
-                "number", "string", "boolean", "true", "false", and "null" in this document are to
-                be interpreted as defined in <xref target="RFC8259">RFC 8259</xref>.
-            </t>
-
             <t>
                 Use Cases describe the system's behavior under various conditions, cataloging who does what with the system, for what purpose, but without concern for system design or implementation.
             </t>