Revert "Not sure if this actually changes anything but it can't hurt."

This reverts commit 34608de2e9.

comfy/ldm/flux/model.py

@@ -106,9 +106,9 @@ class Flux(nn.Module):
         if self.params.guidance_embed:
             if guidance is None:
                 raise ValueError("Didn't get guidance strength for guidance distilled model.")
-            vec.add_(self.guidance_in(timestep_embedding(guidance, 256).to(img.dtype)))
+            vec = vec + self.guidance_in(timestep_embedding(guidance, 256).to(img.dtype))
 
-        vec.add_(self.vector_in(y))
+        vec = vec + self.vector_in(y)
         txt = self.txt_in(txt)
 
         ids = torch.cat((txt_ids, img_ids), dim=1)