How to do current step to unset interface

Hello,

Could you please advise what can I do the correct steps to unset interface by CLI.

I think firstly it require to unset the static route and snmp.   But after that I am no idea what should process first

Following is interface related config.

=================

SSG-> get config | include ethernet0/3
set interface "ethernet0/3" zone "Trust"
set interface "ethernet0/3.21" tag 20 zone "NAT"
set interface "ethernet0/3.100" tag 100 zone "zone 100"
set interface ethernet0/3 ip 111.111.111.1/28
set interface ethernet0/3 route
set interface ethernet0/3.21 ip 192.168.20.1/24
set interface ethernet0/3.21 nat
set interface ethernet0/3.100 ip 172.16.0.1/29
set interface ethernet0/3.100 route
set interface ethernet0/3.21 mtu 1500
set interface ethernet0/3.100 mtu 1500
set interface ethernet0/3 ip manageable
set interface ethernet0/3.21 ip manageable
set interface ethernet0/3.100 ip manageable
unset interface ethernet0/3 manage telnet
set interface ethernet0/3.21 manage ping
set interface ethernet0/3.100 manage ping
set snmp host "snmp-mon1" 192.168.20.100/32 src-interface ethernet0/3  trap v2

set route 333.333.333.0/27 interface ethernet0/3.100 gateway 172.16.0.100
set route 222.222.222.0/27 interface ethernet0/3.100 gateway 172.16.0.100

=============

Thanks!