Changes

Revert "trxcon/trx_if: send NOPE indications if there is no burst"

This reverts commit f8bc28505f60e2a5636ad7779a13374ed661ad14.

Sending NOPE.ind from trxcon is no longer needed, since fake_trx.py
can now generate them on its own (see the related commit).

Change-Id: Ic3c55511cfee911d4eaea0ab19ee6295c9ac28cc
Related: I1e1a5209a9acff6c747cb4c574e9118bc8268474