Delete Jenkinsfile (#3977)

Jenkinsfile

-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements.  See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-pipeline {
-    agent none
-
-    options {
-        buildDiscarder(logRotator(
-            numToKeepStr: '60',
-        ))
-        timestamps()
-        skipStagesAfterUnstable()
-        timeout(time: 5, unit: 'HOURS')
-    }
-
-    environment {
-        MAVEN_OPTS = '-Dmaven.repo.local=.m2/repository -XX:+TieredCompilation -XX:TieredStopAtLevel=1 -XX:+CMSClassUnloadingEnabled -XX:+UseConcMarkSweepGC -XX:-UseGCOverheadLimit -Xmx3g'
-    }
-
-    stages {
-        stage('Install & Test') {
-            parallel {
-                stage('JDK 1.8 on Linux') {
-                    agent {
-                        label 'skywalking || skywalking-se'
-                    }
-
-                    tools {
-                        jdk 'JDK 1.8 (latest)'
-                    }
-
-                    stages {
-                        stage('SCM Checkout') {
-                            steps {
-                                deleteDir()
-                                checkout scm
-                                sh 'git submodule update --init'
-                            }
-                        }
-
-                        stage('Test & Report') {
-                            when {
-                                expression {
-                                    return sh(returnStatus: true, script: 'bash tools/ci/ci-build-condition.sh')
-                                }
-                            }
-                            steps {
-                                sh './mvnw -P"agent,backend,ui,dist,CI-with-IT" -DrepoToken=${COVERALLS_REPO_TOKEN} -DpullRequest=${ghprbPullLink} clean cobertura:cobertura verify coveralls:report install'
-                                sh './mvnw javadoc:javadoc -Dmaven.test.skip=true'
-                            }
-                        }
-
-                        stage('Check Dependencies Licenses') {
-                            when {
-                                expression {
-                                    return sh(returnStatus: true, script: 'bash tools/ci/ci-build-condition.sh')
-                                }
-                            }
-                            steps {
-                                sh 'tools/dependencies/check-LICENSE.sh'
-                            }
-                        }
-                    }
-
-                    post {
-                        cleanup {
-                            deleteDir()
-                        }
-                    }
-                }
-            }
-        }
-    }
-}