Remove unused variable

Leftover from previous code that called get_gas_string

Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Change gas in second cylinder in sac-test-dives

Due to that we can't handle gaschanges to the same gas in another
cylinder, this changes the second gas to EAN22 to workaround that.

Signed-off-by: Anton Lundin <glance@acc.umu.se>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Don't store translated standard weight system names

For the names that we have in our "default set" we need to store the
English name so Subsurface will "do the right thing" when opening the file
in a different locale.

With manually entered names in a local language there's not much we can
do.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>