Please Help Me

In Config How Can I Delete Http-Porxy And Put In This Config CUSTOM-HEADER Host.
..........
Example:
client
proto tcp-client
dev tap
cert ssl/client.crt
key ssl/client.key
remote 85.25.14.66 443
verb 2
mute 20
keepalive 10 120
persist-key
persist-tun
float
#NT 6.0 Compatability
resolv-retry infinite
comp-lzo
tls-client
tls-remote server
ns-cert-type server
tls-auth ssl/ta.key 1
ca ssl/ca.crt
auth-user-pass pass.txt
script-security 2
route-method exe
route-delay 2
http-proxy 72.64.146.136 8080 Yes Here I Want To Remove It But Config Is Working
http-proxy-retry
http-proxy-timeout 6
http-proxy-option CUSTOM-HEADER Host fb.me
........
Thanks For All Please Help Me
