cleanup: Remove old MediaCapabilities workaround
cleanup: Remove old MediaCapabilities workaround

Issue #1391

Change-Id: I7588226e7fa4da72ccf9f5507ae418e8cc326fd6

shaka-project/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player,shaka-project/shaka-player,tvoli/shaka-player