Fix issues detected by lgtm.com

plugins/player_auth/instance.js

@@ -3,7 +3,6 @@
  */
 "use strict";
 const libPlugin = require("@clusterio/lib/plugin");
-const libLuaTools = require("@clusterio/lib/lua_tools");
 
 
 class InstancePlugin extends libPlugin.BaseInstancePlugin {

plugins/player_auth/master.js

@@ -78,7 +78,7 @@ class MasterPlugin extends libPlugin.BaseMasterPlugin {
 			return;
 		}
 
-		for (let [player, entry] of this.players) {
+		for (let entry of this.players.values()) {
 			if (entry.playerCode === playerCode && entry.expires > Date.now()) {
 				let verifyCode = await generateCode(this.master.config.get("player_auth.code_length"));
 				let secret = Buffer.from(this.master.config.get("master.auth_secret"), "base64");

plugins/player_auth/web/index.jsx

@@ -1,7 +1,7 @@
 import React, { useEffect, useState } from "react";
 
 import { libPlugin } from "@clusterio/lib";
-import { notify, notifyErrorHandler } from "@clusterio/web_ui";
+import { notifyErrorHandler } from "@clusterio/web_ui";
 import { Button, Form, Input, Spin, Typography } from "antd";
 
 import "./index.css";