how to remove postgresql out of WHM/cpanel completely ?

Removing Postgresql from Service Status on CPanel WHM

I had a similar problem after removing postgresql. I found the solution here:
TailWatch < AllDocumentation/AutomationIntegration < TWiki

Summary:
One of the most common issues occurs when a service is not monitored or has been disabled and is still listed on the service status page as offline. To fix this error, you may need to remove and/or edit a few files. For the purposes of this tutorial, assume that the service is clamd.

Remember: In the example below, clamd can be replaced with any other service.

Remove the run file:
rm -f /var/run/chkservd/clamd

Remove the chkservd restart file:
rm -f /etc/chkserv.d/clamd

Edit the chkservd configuration file with your preferred text editor. You may need to remove the line for clamd. The chkservd configuration file can be found at:
/etc/chkserv.d/chkservd.conf

Restart chkservd:
/scripts/restartsrv_chkservd

After you have made the necessary changes, simply return to the Service Manager interface and click Save at the bottom without making any changes.

 

thanks guys for the guide , following both pointers worked very well