refactor: avoid unnecessary arguments to methods (#3616)

Author: snitin315

lib/Server.js

@@ -135,13 +135,15 @@ class Server {
   }
 
   // eslint-disable-next-line class-methods-use-this
-  async normalizeOptions(options) {
+  async normalizeOptions() {
+    const { options } = this;
+
     if (!this.logger) {
       this.logger = this.compiler.getInfrastructureLogger("webpack-dev-server");
     }
 
     // TODO: improve this to not use .find for compiler watchOptions
-    const configArray = this.getCompilerConfigArray(this.compiler);
+    const configArray = this.getCompilerConfigArray();
     const watchOptionsConfig = configArray.find(
       (config) => config.watch !== false && config.watchOptions
     );
@@ -1438,7 +1440,7 @@ class Server {
   getStats(statsObj) {
     const stats = Server.DEFAULT_STATS;
 
-    const configArray = this.getCompilerConfigArray(this.compiler);
+    const configArray = this.getCompilerConfigArray();
     const statsOption = this.getStatsOption(configArray);
 
     if (typeof statsOption === "object" && statsOption.warningsFilter) {
@@ -1669,7 +1671,7 @@ class Server {
   }
 
   async start() {
-    await this.normalizeOptions(this.options);
+    await this.normalizeOptions();
 
     if (this.options.ipc) {
       await new Promise((resolve, reject) => {