turn gb_CustomTarget_get_workdir into error and remove old _repo_targets

separate commit since help submodule also uses the macro.

actually turn it into make error to prevent reintroducing it

the repo_target ones are from way back when the whole repo was
split up in many different ones and not used for many years,
no point in having those as errors

Change-Id: I9fd42529d08ea7859b33f8570936f06039cfa184
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/167006
Tested-by: Jenkins
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>

0 files changed, 0 insertions, 0 deletions