If you are not familiar with the oc command, refer to OpenShift - Getting Started with the oc command.

A config map contains files, variables, and command line options that can be used by one or more applications, as a way to create separation between applications and the files, variables, and command line options being used by the applications.

Issue the oc login command and the oc project command to select the project. The oc get configmaps command will display the config maps in the project. In this example, the project contains three config maps.

~]$ oc get configmaps
NAME        DATA      AGE
foo         1         44d
bar         1         44d

The oc delete configmaps command will delete every config map.

~]$ oc delete configmaps

Or, a specific config map can be deleted.

~]$ oc delete configmap foo
configmap "foo" deleted