refactor(core): Update rule typescript-eslint/no-unused-vars to not error when variable starts with _ (#4523)

* ⚡ rule and fixes

* ⚡ clean up

packages/nodes-base/nodes/EmailSend/EmailSend.node.ts

@@ -1,11 +1,5 @@
 import { IExecuteFunctions } from 'n8n-core';
-import {
-	IDataObject,
-	INodeExecutionData,
-	INodeType,
-	INodeTypeDescription,
-	NodeOperationError,
-} from 'n8n-workflow';
+import { IDataObject, INodeExecutionData, INodeType, INodeTypeDescription } from 'n8n-workflow';
 
 import { createTransport } from 'nodemailer';
 import SMTPTransport from 'nodemailer/lib/smtp-transport';