Removed Operators.java to prevent duplicate class build error

Commit #e213e2056163734e8303ac7cfcf79c4dc61a0f2a added Operators.java to android_frameworks_opt_telephony, therefore it needs to be removed from android_device_samsung_smdk4412-qcom-common.

Signed-off-by: Azraels Kiss <azraelskiss@gmail.com>