You can remove a security policy from the ESXi host using the ESXCLI vSphere CLI command.
Verify that the security policy you want to use is not currently in use. If you try to remove a security policy that is in use, the removal operation fails.
At the command prompt, enter the command esxcli network ip ipsec sp remove --sa-name security policy name.
To remove all security policies, enter the command esxcli network ip ipsec sp remove --remove-all.