Bug 21077: Fix database documentation for statistics.type

Bug 21077: Fix database documentation for statistics.type

There's a typo for 'locause', this should be 'localuse'.
Also, 'Credit*' is never used.

Signed-off-by: Maryse Simard <maryse.simard@inlibro.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 0b89cbf6a473e71597bc051d88c2152531648ad8)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit dc490f7d86c182047a55f875d0db9081fe974996)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>