Remove DurationQuotaTrackerProto message.

DurationQuotaTracker isn't checked in right now, so there's no need to
have the proto definition saved. We can add the proto back when we're
checking in the actual tracker.

Bug: 151625245
Test: Android builds
Change-Id: Ic53aa65d8225634c31716d424b99b34e4fc55c76
(cherry picked from commit 15169feef83578c02f8d1194554a3bccac55bd05)
1 file changed