Remove the unused template file for securetty
Remove the unused template file for securetty

... because support for securertty was removed already[1].

[1] f2158dd31289926041bd1358297482cab69bda2b

Change-Id: Idb90b34761fa58ede3dcd3ab5d810274b7c6ed33

openstack/puppet-tripleo,openstack/puppet-tripleo,openstack/puppet-tripleo