Bug 20399: Remove "did you mean" for the staff interface

Bug 20399: Remove "did you mean" for the staff interface

The amdin page for the "did you mean" feature has two block for setting it up in the staff interface, and a note saying this isn't implemented on the staff interface yet.
We remove the part about the staff interface until it actually is implemented.

Test plan :
1) Apply patch
2) Go to Administration > Did you mean?
3) See there is only the OPAC block
4) Change some checkboxes
5) Save configuration
6) Check that configuration is saved

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>