Made app.py cpu only for huggingface spaces

app.py

@@ -10,15 +10,11 @@ css = """
 flatten = lambda l: [item for sublist in l for item in sublist]
 
 def to_data(x):
-    if torch.cuda.is_available():
-        x = x.cpu()
     return x.data.numpy()
 
 def to_var(x):
     if not torch.is_tensor(x):
         x = torch.Tensor(x)
-    if torch.cuda.is_available():
-        x = x.cuda()
     return x
 
 def clear():
@@ -42,7 +38,7 @@ class AI_Companion:
         chatbot: Huggingface Conversational Model Card. Default: af1tang/personaGPT
         """
 
-        self.device = torch.device('cuda') if torch.cuda.is_available() else torch.device('cpu')
+        self.device = torch.device('cpu')
         self.asr = pipeline("automatic-speech-recognition",model = asr,device= -1 if self.device == "cpu" else 0)
         self.model = GPT2LMHeadModel.from_pretrained(chatbot).to(self.device)
         self.tokenizer = GPT2Tokenizer.from_pretrained(chatbot)