At least some IDEs are confused by our multitude of `tools` namespaces,
and show errors like `namespace "tools" is ambiguous`.
This removes one such namespace. The idea is to drop all but the one
in /tools (that has tools::Long and tools::Rectangle).
Change-Id: I6077f50ad0fcc49abfadc75d9948ab63df829ff9
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/189948
Tested-by: Jenkins
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>
Mike Kaganski
f9c16559a8