Disable FXO Port

We are monitoring cat /proc/dahdi/# for the word RED for errors. I am trying to disable ports that we are not using. I would like to disable port 4 if possible. I commented it out in /etc/dahdi/system.conf and /etc/asterisk/dahdi-channels.conf and restarted services but it still shows up in the file below.

Any help would be appreciated.

cat /proc/dahdi/1
Span 1: WRTDM/0 “wrtdm Board 1” (MASTER)

       1 WRTDM/0/0 FXSKS (In use) (EC: WANPIPE_HWEC - INACTIVE)
       2 WRTDM/0/1 FXSKS (In use) (EC: WANPIPE_HWEC - INACTIVE)
       3 WRTDM/0/2 FXSKS (In use) (EC: WANPIPE_HWEC - INACTIVE)
       4 WRTDM/0/3 FXSKS RED (EC: WANPIPE_HWEC - INACTIVE)
       5 WRTDM/0/4
       6 WRTDM/0/5
       7 WRTDM/0/6
       8 WRTDM/0/7
       9 WRTDM/0/8
      10 WRTDM/0/9
      11 WRTDM/0/10
      12 WRTDM/0/11
      13 WRTDM/0/12
      14 WRTDM/0/13
      15 WRTDM/0/14
      16 WRTDM/0/15
      17 WRTDM/0/16
      18 WRTDM/0/17
      19 WRTDM/0/18
      20 WRTDM/0/19
      21 WRTDM/0/20
      22 WRTDM/0/21
      23 WRTDM/0/22
      24 WRTDM/0/23