Steps to delete a worker node in Openshift/Kubernetes

// get all the nodes to select your  node

oc get nodes

Here, we selected the node ocp4.myworkernode.here 

// cordon the node - no more scheduling to this node

oc adm cordon ocp4.myworkernode.here 

// drain the node - remove all pods/resources from the node

oc adm drain ocp4.myworkernode.here  --force --delete-emptydir-data --ignore-daemonsets

// Now, final step delete the node

oc delete node ocp4.myworkernode.here 

PS: Use 'kubectl' instead of oc in case of Kubernetes