Remove errant on_prompt handler

The orchestration code included functionality to track when execution
had completed which is not useful outside of orchestration. As the other
references to completion had been removed, this code was causing
exceptions during execution.

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "comfyui-workflowcheckpointing"
 description = "Automatically creates checkpoints during workflow execution. If If an workflow is canceled or ComfyUI crashes mid-execution, then these checkpoints are used when the workflow is re-queued to resume execution with minimal progress loss."
-version = "1.1.0"
+version = "1.1.1"
 license = { file = "LICENSE" }
 
 [project.urls]

workflowcheckpointing.py

@@ -325,13 +325,6 @@ async def fetch_remote_files(remote_files, uid=None):
     if len(fetches) > 0:
         await asyncio.gather(*fetches)
 
-completion_futures = {}
-def add_future(json_data):
-    index = max(completion_futures.keys())
-    json_data['extra_data']['completion_future'] = index
-    return json_data
-server.PromptServer.instance.add_on_prompt_handler(add_future)
-
 prompt_route = next(filter(lambda x: x.path  == '/prompt' and x.method == 'POST',
                            server.PromptServer.instance.routes))
 original_post_prompt = prompt_route.handler