[lldp] Clean up service start logic owing to port init start optimization (#17133)

As part of service start optimization done, we've removed timer units and used PORT_INIT_DONE as the checkpoint for starting delayed services. Thus this logic is redundant

This fixes the following error log.

Nov  3 14:16:54.281546 r-leopard-44 ERR systemctl[10553]: Failed to get unit file state for lldp.timer: No such file or d

Signed-off-by: Vivek Reddy <vkarri@nvidia.com>

files/build_templates/lldp.timer.j2

@@ -1 +0,0 @@
-per_namespace/lldp.timer.j2

files/scripts/syncd.sh

@@ -105,17 +105,6 @@ function waitplatform() {
             debug "Started pmon service"
         fi
     fi
-    if [[ x"$BOOT_TYPE" = @(x"fast"|x"warm"|x"fastfast") ]]; then
-        debug "LLDP service is delayed by a timer for better fast/warm boot performance"
-    else
-        lldp_state=$(systemctl is-enabled lldp.timer)
-        if [[ $lldp_state == "enabled" ]]
-        then
-            debug "Starting lldp service..."
-            /bin/systemctl start lldp
-            debug "Started lldp service"
-        fi
-    fi
 }
 
 function stopplatform1() {