Remove unnecessary metrics dependency.

WiMAX manager does not currently use libmetrics.

BUG=None
TEST=Tested the following:
1. `FEATURES=test USE='gdmwimax wimax internal' emerge-{lumpy,daisy} platform2`
2. Run network_WiMaxSmoke test.

Change-Id: I1168e44d7bb21e4363b3895e09d253c371748e07
Reviewed-on: https://chromium-review.googlesource.com/186027
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
1 file changed