tdf#100244,126710: sc:Remove unused CheckShowEmpty declaration

ScDPResultMemberFull::CheckShowEmpty(..) is declared but
never implemented - but there is a base class implementation
which is fine.
All existing calls are on ScDPResultMember* so don't hit a problem
but if something tries to call it on a ScDPResultMemberFull* it
tries to call the missing function.

Signed-off-by: Dr. David Alan Gilbert <dave@treblig.org>
Change-Id: I8350517e87ed118e0065412f16aa6053f3bbda9b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/209014
Tested-by: Jenkins
Reviewed-by: David Gilbert <freedesktop@treblig.org>

sc/inc/dptabres.hxx

@@ -657,7 +657,6 @@ public:
                                         const ::std::vector< SCROW >& pItemData,
                                         size_t nPos,
                                         ScDPInitState& rInitState);
-    void CheckShowEmpty( bool bShow = false );
     const ScDPResultData* GetResultData() const { return pResultData; }
 
     bool IsAutoHidden() const { return bAutoHidden; };