These strings were only used in the src and hrc file. No usecase in any .cxx file found.

Change-Id: Ib590629ee4c7a488254a18398ff92e9259f4589c
Reviewed-on: https://gerrit.libreoffice.org/15612Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>