don't delete out param from GetOutputString

we don't own this memory, belongs to svl module

Change-Id: Ief12408e4254ab3fc2069a8490ecf062a728b3d3
Reviewed-on: https://gerrit.libreoffice.org/65349
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

cui/source/options/optupdt.cxx

@@ -152,7 +152,6 @@ void SvxOnlineUpdateTabPage::UpdateLastCheckedText()
         nFormat = pNumberFormatter->GetStandardFormat( SvNumFormatType::TIME, eUILang );
         pNumberFormatter->GetOutputString( aTime.GetTimeInDays(), nFormat, aTimeStr, &pColor );
 
-        delete pColor;
         delete pNumberFormatter;
 
         aText = m_aLastCheckedTemplate;