How do I permanently delete old virtual network devices?

Hi guys, an old Linode (2016) has a bunch of fake network interfaces that I would like to permanently get rid of.

Some findings:

# ls -gG --time-style='+' /sys/class/net
total 0
lrwxrwxrwx 1 0  erspan0 -> ../../devices/virtual/net/erspan0
lrwxrwxrwx 1 0  eth0 -> ../../devices/pci0000:00/0000:00:04.0/virtio2/net/eth0
lrwxrwxrwx 1 0  gre0 -> ../../devices/virtual/net/gre0
lrwxrwxrwx 1 0  gretap0 -> ../../devices/virtual/net/gretap0
lrwxrwxrwx 1 0  ip6gre0 -> ../../devices/virtual/net/ip6gre0
lrwxrwxrwx 1 0  ip6tnl0 -> ../../devices/virtual/net/ip6tnl0
lrwxrwxrwx 1 0  ip6_vti0 -> ../../devices/virtual/net/ip6_vti0
lrwxrwxrwx 1 0  ip_vti0 -> ../../devices/virtual/net/ip_vti0
lrwxrwxrwx 1 0  lo -> ../../devices/virtual/net/lo
lrwxrwxrwx 1 0  sit0 -> ../../devices/virtual/net/sit0
lrwxrwxrwx 1 0  teql0 -> ../../devices/virtual/net/teql0
lrwxrwxrwx 1 0  tunl0 -> ../../devices/virtual/net/tunl0


# ls -l /sys/devices/virtual/net
drwxr-xr-x 5 root root 0 Nov 20 18:49 erspan0
drwxr-xr-x 5 root root 0 Nov 20 18:49 gre0
drwxr-xr-x 5 root root 0 Nov 20 18:49 gretap0
drwxr-xr-x 5 root root 0 Nov 20 18:49 ip6gre0
drwxr-xr-x 5 root root 0 Nov 20 18:49 ip6tnl0
drwxr-xr-x 5 root root 0 Nov 20 18:49 ip6_vti0
drwxr-xr-x 5 root root 0 Nov 20 18:49 ip_vti0
drwxr-xr-x 5 root root 0 Nov 20 18:49 lo
drwxr-xr-x 5 root root 0 Nov 20 18:49 sit0
drwxr-xr-x 5 root root 0 Nov 20 18:49 teql0
drwxr-xr-x 5 root root 0 Nov 20 18:49 tunl0

# rm /sys/class/net/gre0
rm: cannot remove '/sys/class/net/gre0': Operation not permitted

# ip link delete gre0 returns nothing, and it's still there.

Running Arch Linux with the latest kernel 5.8.10-x86_64-linode138
All Boot Helpers enabled, should I try without them?

Any ideas?