i want to uninstall SQL 2012 passive server from VCS cluster which is configured in HA

HI Team,

In my environment i have SQL 2012 server in active and passive mode. This is configured in VCS cluster in HA. Last night I have some issue in Passive node now i want uninstall SQL 2012 server from passive node.  

Does anyone know what steps I need to take to Un-Install SQL Server 2012 from the passive node and then re-install with the right configuration