Fixing Space (seed variable doesn't exist)

Fix a bug introduced in #8.

app.py

@@ -320,7 +320,6 @@ def simple_call(prompt1, prompt2, profile: gr.OAuthProfile | None=None):
     user_history.save_image(label=f"{prompt1} / {prompt2}", image=image1, profile=profile, metadata={
         "prompt2": prompt1,
         "prompt1": prompt2,
-        "seed": seed,
     })
 
     return image1