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/Aws/S3/GenericFunctions.ts

@@ -9,12 +9,7 @@ import {
 	IWebhookFunctions,
 } from 'n8n-core';
 
-import {
-	IDataObject,
-	IHttpRequestOptions,
-	JsonObject,
-	NodeApiError,
-} from 'n8n-workflow';
+import { IDataObject, IHttpRequestOptions, JsonObject, NodeApiError } from 'n8n-workflow';
 
 export async function awsApiRequest(
 	this: IHookFunctions | IExecuteFunctions | ILoadOptionsFunctions | IWebhookFunctions,
@@ -25,10 +20,9 @@ export async function awsApiRequest(
 	query: IDataObject = {},
 	headers?: object,
 	option: IDataObject = {},
-	region?: string,
+	_region?: string,
 	// tslint:disable-next-line:no-any
 ): Promise<any> {
-	const credentials = await this.getCredentials('aws');
 	const requestOptions = {
 		qs: {
 			...query,
@@ -174,9 +168,3 @@ export async function awsApiRequestSOAPAllItems(
 
 	return returnData;
 }
-
-function queryToString(params: IDataObject) {
-	return Object.keys(params)
-		.map((key) => key + '=' + params[key])
-		.join('&');
-}