Remove redundant import of torch in app.py and add it back for proper functionality with GPU context and autocasting.

app.py

@@ -1,7 +1,7 @@
 import subprocess
 import sys
 import spaces
-
+import torch
 
 @spaces.GPU(duration=10)
 @torch.autocast("cuda")
@@ -20,7 +20,7 @@ from functools import partial
 
 import gradio as gr
 import numpy as np
-import torch
+
 from omegaconf import OmegaConf
 from modeling.pipeline import VMemPipeline
 from diffusers.utils import export_to_video