efbfb4e404
A recent update [0] to the IANA timezone database has improved the
historical accuracy of transitions in Mexico. It turns out that the
transition at the start of 1970 was not a real event. The only actual
change then was that Mazatlan has followed the main Mexico zone rules
since then, having ignored some transitions of the main zone in
earlier decades.
[0] 812aff32b3
Fixes: QTQAINFRA-6757
Change-Id: I65d8ea1dfa76ce635bf11ffcc1ded8c9ceaf9fec
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
(cherry picked from commit 8a27c310b1e4ebc74999e09551ca5eab4570a68e)
Reviewed-by: Jani Heikkinen <jani.heikkinen@qt.io>