cleaned manifest example

README.md

@@ -336,8 +336,6 @@ To use canary-180m-flash for transcribing other supported languages or perform S
 # Example of a line in input_manifest.json
 {
     "audio_filepath": "/path/to/audio.wav",  # path to the audio file
-    "duration": 1000,  # duration of the audio, can be set to `None` if using NeMo main branch
-    "taskname": "asr",  # use "s2t_translation" for speech-to-text translation with r1.23, or "ast" if using the NeMo main branch
     "source_lang": "en",  # language of the audio input, set `source_lang`==`target_lang` for ASR, choices=['en','de','es','fr']
     "target_lang": "en",  # language of the text output, choices=['en','de','es','fr']
     "pnc": "yes",  # whether to have PnC output, choices=['yes', 'no']