The "Reboot Required" message is displayed on the ESXi host after performing esxcli command with dry-run option when patching an ESXi host.
VMware ESXi 7.x
Although a reboot is not necessary after performing esxcli command with dry-run option when patching an ESXi host, an internal flag is set, which results in the "Reboot Required" message being displayed on the UI.
This issue is resolved on VMware ESXi 7.0 Update 2.
Once this issue is occurred, reboot the ESXi host to remove this message.