update jenkinsFile

Author: Jingjia01

JenkinsFile

@@ -12,17 +12,8 @@ pipeline {
     stages {
         stage('Checkout repository') {
             steps {
-                checkout([
-                    $class: 'GitSCM',
-                    branches: [[name: 'main']],
-                    doGenerateSubmoduleConfigurations: false,
-                    extensions: [
-                        [$class: 'CloneOption', shallow: false, depth: 0]
-                    ],
-                    userRemoteConfigs: [[
-                        url: 'https://github.com/Jingjia01/elasticsearch.git'
-                    ]]
-                ])
+                git branch: 'main',
+                    url: 'https://github.com/Jingjia01/elasticsearch.git'
             }
         }