source.ctf.lttng-live: clean-up: don't restart session iteration

source.ctf.lttng-live: clean-up: don't restart session iteration

Don't restart the iteration on a session array when a session has to
be removed. The contents of the array's current position are replaced
by the contents of the last position in the array. Thus, we can
continue the iteration from the current index.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: If058fe4b10c9c422b9f54edd63900b6804bbe8e2
Reviewed-on: https://review.lttng.org/c/babeltrace/+/2264
Reviewed-by: Simon Marchi <simon.marchi@efficios.com>