Revert "d2lte: Modify 'roamingText3' for Network Extender support."

This reverts commit 49b7d29843903a88b612786afbd8f28ff7c242e8.

See http://review.cyanogenmod.org/#/c/61044/

Change-Id: I817af9cbd59401c73c37929698f63785810e9284