TT#154255 Remove redis dependency from unit file

We are migrating from redis to keydb so for now we need to support both
so we should not depend on specific key-value storage in unit file but
should use database.key_value.flavor value in override file.

But we can't redefine dependencies in override file just add additional
ones. So remove it from unit file.

Change-Id: I94ef109ce68c61ba3d195d00527e2d0612b6d886

debian/ngcp-sems.service

@@ -1,13 +1,11 @@
 [Unit]
 Description=NGCP SIP Express Media Server (SEMS)
 After=mariadb.service
-After=redis-master.service
 After=remote-fs.target
 After=network-online.target
 Requires=network-online.target
 Wants=remote-fs.target
 Wants=mariadb.service
-Wants=redis-master.service
 
 [Service]
 Type=simple