Update README.md

Can set num_return_sequences to > 1 only if we're using Greedy search (we're not, since do_sample by default is True)

README.md

@@ -7,7 +7,6 @@ inference:
     use_cache: false
     max_length: 200
     top_k: 5
-    num_return_sequences: 3
     
     
 widget: