nicki: Remove obslete flags

* With https://github.com/CyanogenMod/android_build/commit/1059484fad6c1f754194a0636eaea720676755ed we no longer need to set qcom display/media/audio variants in BoardConfig.

Change-Id: I726f5265b9bd2932306c098553ac39f3dc4c521d
Signed-off-by: Arnav Gosain <gosain.arnav@gmail.com>