Bug 19920: Removed unnecessary code from C4/Members.pm

Bug 19920: Removed unnecessary code from C4/Members.pm

A seperate bug (Bug 16853) removed the subroutine used in this file. I removed the code as it had become unnecessary.

Test plan:
1. Confirm that &changepassword can't be found in C4/Members.pm

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 9f446de79128352fe5138bb22260a49254c65450)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit a41ee8ad18acafde0a045b4908ecfc90118bdf0a)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 2ec9cb5e9450a3906558b6b5d1cadd7eea2c010c)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>