How to remove a node from HA pacemaker cluster

Reference:  man sleha-remove
   Syntax:   sleha-remove <options> -c <ip address or hostname>   
   Logfile:  /var/log/sleha-bootstrap.log

SUSE Linux Enterprise High Availability Extension 12 and 15
RPM: ha-cluster-bootstrap includes scripts:
       /usr/sbin/ha-cluster-init    
       /usr/sbin/ha-cluster-join    
       /usr/sbin/ha-cluster-remove 
Reference:  man ha-cluster-remove
   Syntax:  ha-cluster-remove <options> <ip address or hostname>
Normally this is run from a different node in the cluster.  
However, If you need to remove the current node's cluster configuration, you can run from the current node using <ip address or hostname of current node> with the "-F" option to force remove the current node.
     # ha-cluster-remove -F <ip address or hostname>
   Logfile:  /var/log/ha-cluster-bootstrap.log

Note: 
In addition to remove the node clearly from cluster, the following files are deleted from the node:
       /etc/csync2/csync2.cfg /etc/csync2/key_hagroup
              csync2 configuration files.
       /etc/corosync/corosync.conf
              corosync configuration file.
       /etc/sysconfig/sbd
              SBD fencing configuration.
Note: 
This logic has also been added to the crm shell and can be run using the following commands.
   # crm cluster init
   # crm cluster join 
   # crm cluster remove