This is the output
[fred@fred-pc ~]$ efibootmgr -v
BootCurrent: 0005
Timeout: 1 seconds
BootOrder: 0005,0001,0002,0003,0000
Boot0000* ubuntu HD(2,GPT,ff0b5c90-c0db-430c-8ba5-3e828594656f,0x190800,0x82000)/File(\EFI\ubuntu\shimx64.efi)
Boot0001* antergos_grub HD(2,GPT,ff0b5c90-c0db-430c-8ba5-3e828594656f,0x190800,0x82000)/File(\EFI\antergos_grub\grubx64.efi)
Boot0002* Windows Boot Manager HD(2,GPT,ff0b5c90-c0db-430c-8ba5-3e828594656f,0x190800,0x82000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...9................
Boot0003* ubuntu HD(2,GPT,ff0b5c90-c0db-430c-8ba5-3e828594656f,0x190800,0x82000)/File(\EFI\Ubuntu\grubx64.efi)
Boot0005* Linux Boot Manager HD(2,GPT,ff0b5c90-c0db-430c-8ba5-3e828594656f,0x190800,0x82000)/File(\EFI\systemd\systemd-bootx64.efi)
I can delete here what you see above:
Boot0000*, Boot0001 and Boot0003*
Boot0002 I need for windows and Boot0005 is the boot manager I now use.
Is this correct what I think?