Revert "[test] st_en"

This reverts commit afe4a7c18a26e400cc3f8bdc0a648287771e36e6.

app.py

@@ -155,8 +155,12 @@ def translate_to_english(audio_file, source_language):
     # Load and resample the audio file to 16kHz
     speech, _ = librosa.load(audio_file, sr=16000)
     
+    # Reset beam search state
+    model.beam_search.hyps = None
+    model.beam_search.pre_beam_score_key = None
+    
     # Set task to speech translation to English
-    model.task_sym = "<st_en>"
+    model.task_sym = "<st_eng>"
     
     # Set source language
     if source_language != None: