Clean up the obsolete codes in libmix

BZ: 62108

Clean up the obsolete codes in libmix for code coverage improvement
and easier maintenance. Use the existing MARRO VBP (#ifndef VBP)
to comment out the unused/uncalled functions or codes.

Change-Id: Ibba20c00e80e85ca0f3c5443bf67a0088d7d7947
Signed-off-by: wfeng6 <wei.feng@intel.com>
Reviewed-on: http://android.intel.com:8080/69984
Reviewed-by: Chen, Tianmi <tianmi.chen@intel.com>
Reviewed-by: Wang, Yi A <yi.a.wang@intel.com>
Reviewed-by: Qiu, Junhai <junhai.qiu@intel.com>
Reviewed-by: Jiang, Fei <fei.jiang@intel.com>
Reviewed-by: Guo, Nana N <nana.n.guo@intel.com>
Reviewed-by: Shi, PingX <pingx.shi@intel.com>
Tested-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
20 files changed