Remove name and classname from mjmWrap.

PiperOrigin-RevId: 609563968
Change-Id: Ic69b95412ec5914fb5a8dcd134c7e6e733bc05b0

src/user/user_api.h

@@ -582,8 +582,6 @@ typedef struct _mjmTendon {        // tendon specification
 
 typedef struct _mjmWrap {          // wrapping object specification
   mjElement element;               // internal, do not modify
-  mjString name;                   // name
-  mjString classname;              // class name
   mjString info;                   // message appended to errors
 } mjmWrap;