clean up documentation

Since LibreOffice 4.1.1, this changed
from encoded integer to self-explaining structure.

Change-Id: I633e85d1c2d5dca53313661bb3ec218480142dc8

offapi/com/sun/star/awt/UnoControlDateFieldModel.idl

@@ -65,8 +65,6 @@ published service UnoControlDateFieldModel
 
 
     /** specifies the date displayed in the control.
-
-        <p>The date must be specified in the format YYYYMMDD.</p>
      */
     [property] ::com::sun::star::util::Date Date;