test/decode_test_driver: rm unused deadline member

has the side-effect of removing some lint and -Wshorten-64-to-32
warnings

ported from libvpx:
1b1e40c0b test/decode_test_driver: rm unused deadline member

Change-Id: Ic0ed650c856bf81f0ed2226601d86062d8fd10a4
4 files changed