ltp: remove leapsec_timer test from stable set

The leapsec_timer test can timeout if the device synchronizes with
network time. Remove the leapsec_timer test from the stable set. It will
no longer be built so will not be in staging either.

Test: run vts-kernel -m VtsKernelLtp
Bug: 69252201
Change-Id: I64aedd582fe25bc37f58e00c42cfcdd78bcd38b7
1 file changed