removed the line which caused a problem in nfa_tutorial (#11710)

Signed-off-by: Ssofja <sofiakostandian@gmail.com>
Signed-off-by: Abhinav Garg <abhgarg@nvidia.com>

Author: Ssofja

nemo/collections/asr/models/hybrid_rnnt_ctc_models.py

@@ -155,7 +155,6 @@ def transcribe(
                     decoding_cfg.preserve_alignments = True
                 self.change_decoding_strategy(decoding_cfg, decoder_type=self.cur_decoder, verbose=False)
             else:
-                return_hypotheses = False
                 with open_dict(decoding_cfg):
                     decoding_cfg.compute_timestamps = False
                     decoding_cfg.preserve_alignments = False