msDescription in SvtRulerAccessible is unused

ever since

    commit 2b12a5b8
    Date:   Mon Feb 10 09:29:34 2014 +0000
    the return of callcatcher

Change-Id: I62021793e5ca90cba9d2e6998f5ac30da33764f7

include/svtools/accessibleruler.hxx

@@ -182,11 +182,6 @@ protected:
     void ThrowExceptionIfNotAlive();
 
 private:
-    /** Description of this object.  This is not a constant because it can
-        be set from the outside.
-    */
-    ::rtl::OUString                     msDescription;
-
     /** Name of this object.
     */
     ::rtl::OUString                     msName;

svtools/source/control/accessibleruler.cxx

@@ -181,8 +181,7 @@ sal_Int16 SAL_CALL SvtRulerAccessible::getAccessibleRole()
 
 OUString SAL_CALL SvtRulerAccessible::getAccessibleDescription()
 {
-    ::osl::MutexGuard   aGuard( m_aMutex );
-    return msDescription;
+    return OUString();
 }
 
 OUString SAL_CALL SvtRulerAccessible::getAccessibleName()