With patch-iso-debian dropping the requirement for 7z,
we can remove it from the lat dockerfile.
Test Plan:
pass - build lat docker image and run container
Partial-Bug: 2098385
Depends-On: https://review.opendev.org/c/starlingx/root/+/941495
Change-Id: Iceba679ba0c8dcddacb0750d6e531436cb759612
Signed-off-by: Leonardo Fagundes Luz Serrano <Leonardo.FagundesLuzSerrano@windriver.com>
f0526f9110