Remove the apparmor-folks test case

Folks test cases are not so relevant anymore.

The apparmor-folks test case has not been executed for several releases
already (it was not executed for 18.12 and for 18.09 was only executed
for half the platforms with some failures too).

This commit removes the apparmor-folks test case.

Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>