Update pre-requirements.txt

pre-requirements.txt

@@ -1,6 +1,4 @@
 numpy==1.23
-
---extra-index-url https://download.pytorch.org/whl/cu118
-torch==2.0.0+cu118
-torchvision==0.15.0+cu118
-torchaudio==2.0.0+cu118
+torch==2.0.0
+torchvision==0.15.0
+torchaudio==2.0.0