Remove unused on_event callback from orchestration_manager

[Fr4nc3]

Deleted the unified event callback function and its related code from OrchestrationManager, as it is no longer used in the workflow assembly. The .on_event() attachment is commented out, reflecting a shift to a different event handling approach.

Purpose

• ...

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information