Revert "msm8974: Use mm-parser for Matroska"

 * This is superseded by the MKV parser in our framework which
   now supports all the required formats (AC3, DTS, FLAC, HEVC)

This reverts commit 55c7d236cb402e16f6a1dd0be275d5e7c37a55d4.

Change-Id: If491d10cf5d242667a9d9562931cc1404711086e