tdf#92256: Don't force CalcA1 syntax on all !Microsoft xlsx docs
tdf#92256: Don't force CalcA1 syntax on all !Microsoft xlsx docs

in other words, don't override user's configuration of string ref
syntax

Change-Id: I70281f6869663ccdaabacf506f6effcaf4b5a3fa
Reviewed-on: https://gerrit.libreoffice.org/17702
Reviewed-by: Eike Rathke <ca97d066ec547ed7b5f176c01ed86da55dede03e@redhat.com>
Tested-by: Eike Rathke <ca97d066ec547ed7b5f176c01ed86da55dede03e@redhat.com>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core