Update lhotse.py (#1414)

Remove the deprecated usage.

lhotse/bin/lhotse.py

@@ -1,22 +1,6 @@
 #!/usr/bin/env python3
 """
-Use this script like:
-
-$ lhotse --help
-$ lhotse make-feats --help
-$ lhotse make-feats --compressed recording_manifest.yml mfcc_dir/
-$ lhotse write-default-feature-config feat-conf.yml
-$ lhotse kaldi import data/train 16000 train_manifests/
-$ lhotse split 3 audio.yml split_manifests/
-$ lhotse combine feature.1.yml feature.2.yml combined_feature.yml
-$ lhotse recipe --help
-$ lhotse recipe librimix-dataprep path/to/librimix.csv output_manifests_dir/
-$ lhotse recipe librimix-obtain target_dir/
-$ lhotse recipe mini-librispeech-dataprep corpus_dir/ output_manifests_dir/
-$ lhotse recipe mini-librispeech-obtain target_dir/
-$ lhotse cut --help
-$ lhotse cut simple supervisions.yml features.yml simple_cuts.yml
-$ lhotse cut stereo-mixed supervisions.yml features.yml mixed_cuts.yml
+Use this script like: https://lhotse.readthedocs.io/en/latest/cli.html
 """
 
 # Note: we import all the CLI modes here so they get auto-registered