Remove unused pipeline script

Jenkinsfile

@@ -1,19 +0,0 @@
-node {
-    try {
-        lock(resource: "sap-jenkins-library/10", inversePrecedence: true) {
-            milestone 10
-            deleteDir()
-            stage ('Checkout'){
-                checkout scm
-            }
-            stage ('Test') {
-                sh "mvn clean test --batch-mode"
-            }
-        }
-    } catch (Throwable err) {
-        echo "Error occured: ${err}"
-        currentBuild.result = 'FAILURE'
-        mail subject: '[Build failed] SAP/jenkins-library', body: 'Fix the build.', to: 'marcus.holl@sap.com,oliver.nocon@sap.com'
-        throw err
-    } 
-}