Bug 30891: SMS provider shows on staff side even if SMS::Send driver is not set to...

Bug 30891: SMS provider shows on staff side even if SMS::Send driver is not set to "Email"

It appears that in my original submission ( Bug 9021 ),
I hid the SMS provider selector unless the SMS::Send
driver was set to "Email", but only on the OPAC,
not on the staff interface!

Test Plan:
1) Set SMSSendDriver to anything except "Email"
2) Note the SMS Provider pulldown shows in the patron editor
3) Apply this patch
4) Reload the page, SMS Provider id should now be gone
5) Set SMSSendDriver to "Email"
6) Reload the page, SMS Provider should now be shown

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>