Revert "[i9300] Add omni apns"

We move to omni gsm.mk.

This reverts commit 2878f1be94f68e0f028ebdc44a7cded0e7167b5a.

Change-Id: I2d4f72fe170130b026163a68825e83af82050e94
Merge "Revert "[i9300] Add omni apns"" into android-4.3