bliss: build: Drop MTK board platforms

 * Remove MTK board platforms, nothing uses this when
   looking for 'MTK_BOARD_PLATFORMS' across the entire
   organization. This lets us revert the utilities back
   to how they were in the QCOM tree.

Change-Id: If3d3a3e7543b79108b26a30c0e02bb3ab154f279
1 file changed