Refactor AutoPipelineForText2Image initialization in lifespan function

main.py

@@ -15,9 +15,9 @@ from diffusers import (
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
-    text2img = AutoPipelineForText2Image.from_pretrained(
-        "stabilityai/sdxl-turbo", torch_dtype=torch.float16, variant="fp16"
-    ).to("cpu")
+    text2img = AutoPipelineForText2Image.from_pretrained("stabilityai/sdxl-turbo").to(
+        "cpu"
+    )
 
     img2img = AutoPipelineForImage2Image.from_pipe(text2img).to("cpu")