Bug 11855: Tiny code cleanup in members

Bug 11855: Tiny code cleanup in members

[1] Template variable actionname is not used in the associated
template. This could be a copy-paste from serials/member-search.pl.
Consequently, the module is no longer needed in member.pl. Template
members/search.tt still contains actionname; it seems that this
emplate is not used too.

[2] $template_name not used in members-home.pl.

Test plan:
[1] Go to Patrons. If you reach that page, you tested members-home.pl
[2] Add a new patron.
[3] Search for a patron. Edit one.

Followed test plan. No problems found.
Signed-off-by: Marc Véron <veron@veron.ch>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit fad3d646ff9f9ef3b9808e245f7d8b4077e63fa5)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>