The scripts/build.sh script has an option --skip-googlemaps. Introduced
in 2017 at a moment the Travis Mac build failed on this. Interestingly,
when Mac building of the maps plugin was possible again (commit 79e3f69f48)
the --skip-googlemaps stayed. Obviously, this hack was never intended
to be used for anything else then getting it passed Travis on
some point in time for a specific Mac build.
So, remove this option.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>