[demo] remove English

app.py

@@ -20,8 +20,6 @@ import librosa
 
 wenet.set_log_level(2)
 decoder = wenet.Decoder(lang='chs')
-cur_lang = 'EN'
-# decoder_en = wenet.Decoder(lang='en')
 
 
 def recognition(audio, lang='CN'):
@@ -30,24 +28,13 @@ def recognition(audio, lang='CN'):
     y, _ = librosa.load(audio, sr=16000)
     # NOTE: model supports 16k sample_rate
     y = (y * (1 << 15)).astype("int16")
-    global cur_lang
-    global decoder
     if lang == 'CN':
-        if cur_lang != lang:
-            del decoder
-            decoder = wenet.Decoder(lang='chs')
-            cur_lang = 'CN'
         ans = decoder.decode(y.tobytes(), True)
     elif lang == 'EN':
-        if cur_lang != lang:
-            del decoder
-            decoder = wenet.Decoder(lang='en')
-            cur_lang = 'EN'
-        ans = decoder.decode(y.tobytes(), True)
         return "ERROR! English is not supported yet!"
     else:
         return "ERROR! Please select a language!"
-    
+
     if ans is None:
         return "ERROR! No text output! Please try again!"
     # NOTE: ans (json)