To remove the datastore mount points from unmanaged hosts follow the below steps:
1. Use vSphere Client to login to ESXi/VC to check the mounted datastores on hosts.You can also login to ESXi host via ssh and run below command to list the mounted datastore on hosts.

2. Run below command on the ESXi hosts to remove the NFS mount point listed from step 1.
root@esxi:~] esxcli storage nfs remove --volume-name=lcm-bundle-repo
3. Run below command on ESXi hosts to verify if the NFS mount point has been removed. Also you can retry the failed workflow and verify if it goes through.
[root@esxi:~] esxcli storage nfs list