sepolicy: remove duplicate i2c-6 ยท mordiford-RR/resurrection_device_oneplus_oneplus2@544d3fe

added to common/file_contexts @ android_device_qcom_sepolicy https://github.com/CyanogenMod/android_device_qcom_sepolicy/commit/242e02cf4c3bb17bdad2351049cff7390f81a2c8