MINOR: stream: Remove the lock on the proxy to update time stats

swrate_add() is now thread-safe. So the lock on the proxy is no longer needed to
update q_time, c_time, d_time and t_time.

(cherry picked from commit b927a9d8668208eb7a34f88e8db916262d0e698c)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed