cellular: Remove obsolete and unused server/control.network_3g_gobi

BUG=chromium:404003
TEST=Trybot run on paladin, release, and chromiumos-sdk builders.

Change-Id: I66a5ea83070c2b37bb5d49910d9d5dbd2be9d798
Reviewed-on: https://chromium-review.googlesource.com/215682
Reviewed-by: Simran Basi <sbasi@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Commit-Queue: Ben Chan <benchan@chromium.org>
1 file changed