BUG/MINOR: quic: Remaining useless statements in cubic slow start callback

When entering a recovery period, the algo state is set by quic_enter_recovery().
And that's it!. These two lines should have been removed with this commit:

     BUG/MINOR: quic: Wrong use of now_ms timestamps (cubic algo)

Take the opportunity of this patch to add a missing TRACE_LEAVE() call in
quic_cc_cubic_ca_cb().

Must be backported to 2.7 and 2.6.
1 file changed