If you do not want your server to be an ESXi host, you can decommission the ESXi host machine.
- Remove VMFS datastores on the internal disks so that the internal disks are no longer set up to store virtual machines.
- Change the boot setting in the BIOS so that the host no longer boots into ESXi.
If you installed ESXi in UEFI mode, delete the boot option VMware ESXi or any other boot option created manually.
- Install another operating system in its place.