Bug 27569: Remove non mysql code

Bug 27569: Remove non mysql code

Remove a bit of the confusion by removing unless code (not related to
mysql)

Signed-off-by: Ron Houk <rhouk@ottumwapubliclibrary.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit dfd42a4eb26a2ac00fe116f22409779047edd02b)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit eac9e84792316872734133e23e2386f704feecff)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
(cherry picked from commit 959b76f77979af4b9e8d54cecd3ce389647f3325)
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>