Removed phased loop check

The CHECK statement was verifying that the period wasn't changing,
which we are now purposfully changing.

Change-Id: I811a6f0e928275d4a33318f84a1652a53f1add99
diff --git a/aos/common/util/phased_loop.cc b/aos/common/util/phased_loop.cc
index bea262d..5382df2 100644
--- a/aos/common/util/phased_loop.cc
+++ b/aos/common/util/phased_loop.cc
@@ -15,7 +15,6 @@
 
   const monotonic_clock::duration difference = next_time - last_time_;
   const int result = difference / interval_;
-  CHECK_EQ(difference, interval_ * result);
   CHECK_EQ(
       0, (next_time - offset_).time_since_epoch().count() % interval_.count());
   CHECK_GE(next_time, now);