remove code coverage test related code from libmix test tool

BZ: 94345

remove code coverage test related code from mix_encoder.cpp;
Will commit a new tool for code coverage test to local git server.

Change-Id: I05b7aefee271330b7274c9eb7f9d0dc8e4dd183f
Signed-off-by: Liu Bolun <bolunx.liu@intel.com>
Reviewed-on: http://android.intel.com:8080/106713
Reviewed-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: cactus <cactus@intel.com>
Tested-by: Shi, PingX <pingx.shi@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>
1 file changed