refactor(core): Refactor WorkflowStatistics code (no-changelog) (#6617)

refactor(core): Refactor WorkflowStatistics code

packages/core/src/EventEmitter.ts

@@ -1,15 +0,0 @@
-import EventEmitter from 'events';
-
-interface EventTypes {
-	nodeFetchedData: string;
-	workflowExecutionCompleted: string;
-}
-
-class N8NEventEmitter extends EventEmitter {
-	types: EventTypes = {
-		nodeFetchedData: 'nodeFetchedData',
-		workflowExecutionCompleted: 'workflowExecutionCompleted',
-	};
-}
-
-export const eventEmitter = new N8NEventEmitter();

packages/core/src/index.ts

@@ -1,4 +1,3 @@
-import { eventEmitter } from './EventEmitter';
 import * as NodeExecuteFunctions from './NodeExecuteFunctions';
 import * as UserSettings from './UserSettings';
 
@@ -14,5 +13,5 @@ export * from './LoadNodeParameterOptions';
 export * from './LoadNodeListSearch';
 export * from './NodeExecuteFunctions';
 export * from './WorkflowExecute';
-export { eventEmitter, NodeExecuteFunctions, UserSettings };
+export { NodeExecuteFunctions, UserSettings };
 export * from './errors';