Remove non-existent header.
Remove non-existent header.

This utility file was going to be added, but was decided against adding
it.  This removes a usage of the header that was missed.

Change-Id: I4251d64ae914316809894c7bc6059fb63580934f

shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded,shaka-project/shaka-player-embedded