Revert "Add max size to queue"

This reverts commit a1933840a7c37872921eb3457dc268b4df288e42.

app.py

@@ -87,8 +87,7 @@ def main():
             )
 
     concurrency_limit = 2 if os.environ.get('CONCURRENCY_LIMIT') is None else int(os.environ.get('CONCURRENCY_LIMIT'))
-    max_size = 5 if os.environ.get('MAX_QUEUE_SIZE') is None else int(os.environ.get('MAX_QUEUE_SIZE'))
-    demo.queue(default_concurrency_limit=concurrency_limit, max_size=max_size)
+    demo.queue(default_concurrency_limit=concurrency_limit)
     demo.launch(share=True)