CLEANUP: quic: remove unused rxbufs member in receiver

rxbuf is the structure used to store QUIC datagrams and redispatch them
to the connection thread.

Each receiver manages a list of rxbuf. This was stored both as an array
and a mt_list. Currently, only mt_list is needed so removed <rxbufs>
member from receiver structure.

This should be backported up to 2.6.
2 files changed