Remove broken j.u.logging sample

Logging works out of the box now so a complex sample app is not
much useful for most users.

Bug: issue 8971
Change-Id: I037bb9a551f9e5f1ead0cddc0f25578da894e293
(cherry picked from commit 54908f2a3858a14ebeaf16ef38eec8d05a37be46)