Bug 10458: Remove obsolete Z3950 module and test

Bug 10458: Remove obsolete Z3950 module and test

Are not used. Contain several FIXMEs.
Removing them makes life easier.

Test plan:
Actually, you cannot test this.
But for confidence: do a Z3950 search in cataloguing and acquisition.

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 63ba05183e627bbe7278b9064d22e93d39b65461)
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>
(cherry picked from commit 1dbd1d938aabb72021cd8157e111d3f7555fff9d)
Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
(cherry picked from commit 1dbd1d938aabb72021cd8157e111d3f7555fff9d)