delete spurious duplicate sup entry

Author: davidcarlisle

unicode.xml

@@ -1744,9 +1744,6 @@ Barbara Beeton for the STIX project
       <character id="U00073-00069-0006E-00068" dec="115-105-110-104">
          <description>MULTIPLE CHARACTER OPERATOR: sinh</description>
       </character>
-      <character id="U00073-00075-0007" dec="115-117-112">
-         <description>MULTIPLE CHARACTER OPERATOR: sup</description>
-      </character>
       <character id="U00073-00075-00070" dec="115-117-112">
          <description>MULTIPLE CHARACTER OPERATOR: sup</description>
       </character>