Remove deprecated tail_log function

This function has been deprecated for a long time, let's finally
remove it. It is only generating a warning anyway.

Change-Id: I7bd440adf2ce8283e3ad3d5d09e6b2b877e2b42e

Author: jharbott

functions-common

@@ -1609,10 +1609,6 @@ function service_check {
 }
 
 
-function tail_log {
-    deprecated "With the removal of screen support, tail_log is deprecated and will be removed after Queens"
-}
-
 # Plugin Functions
 # =================
 

lib/placement

@@ -148,7 +148,6 @@ function start_placement_api {
     else
         enable_apache_site placement-api
         restart_apache_server
-        tail_log placement-api /var/log/$APACHE_NAME/placement-api.log
     fi
 
     echo "Waiting for placement-api to start..."

lib/tls

@@ -570,14 +570,6 @@ EOF
     restart_apache_server
 }
 
-# Follow TLS proxy
-function follow_tls_proxy {
-    sudo touch /var/log/$APACHE_NAME/tls-proxy_error.log
-    tail_log tls-error /var/log/$APACHE_NAME/tls-proxy_error.log
-    sudo touch /var/log/$APACHE_NAME/tls-proxy_access.log
-    tail_log tls-proxy /var/log/$APACHE_NAME/tls-proxy_access.log
-}
-
 # Cleanup Functions
 # =================