docs: remove limitation on early probes

This is no longer true since we're parsing the packet in userspace. Packets will
be captured from the MAC or network offset in all cases up until the limit or
skb len, not metadata from in-kernel parsing.

Signed-off-by: Antoine Tenart <atenart@redhat.com>

Author: atenart

docs/limitations.md

@@ -31,9 +31,3 @@
 - As explained in the [filtering section](https://retis.readthedocs.io/en/stable/#filtering)
   filters are eventually translated to eBPF instructions. Currently, the maximum
   allowed size for an eBPF filter is 4096 instructions.
-
-- Some fields present in the packet might not be reported when probes are early
-  in the stack, while being shown in later ones. This is because Retis probes
-  rely on the networking stack knowledge of the packet and if some parts weren't
-  processed yet they can't be reported. E.g. TCP ports won't be reported from
-  `kprobe:ip_rcv`.