[build] Removed obsolete Slack notifications

Jenkinsfile

@@ -1,26 +1,22 @@
 node {
-	try {
-		properties([
-			[$class: 'BuildDiscarderProperty', strategy: [$class: 'LogRotator', numToKeepStr: '15']],
-			pipelineTriggers([cron('H 2 * * *')])
-		])
-
-		stage 'Checkout'
+	properties([
+		[$class: 'BuildDiscarderProperty', strategy: [$class: 'LogRotator', numToKeepStr: '15']],
+		pipelineTriggers([cron('H 2 * * *')])
+	])
+
+	stage('Checkout') {
 		checkout scm
 
 		dir('build') { deleteDir() }
 		dir('.m2/repository/org/eclipse/xtext') { deleteDir() }
 		dir('.m2/repository/org/eclipse/xtend') { deleteDir() }
-
-		stage 'Maven Build'
+	}
+
+	stage('Maven Build') {
 		def workspace = pwd()
-        def mvnHome = tool 'M3'
+		def mvnHome = tool 'M3'
 		sh "${mvnHome}/bin/mvn -f releng --batch-mode --update-snapshots -fae -Dmaven.repo.local=${workspace}/.m2/repository clean install"
-		archive 'build/**'
-
-		slackSend "Build Succeeded - ${env.JOB_NAME} ${env.BUILD_NUMBER} (<${env.BUILD_URL}|Open>)"
-	} catch (e) {
-		slackSend color: 'danger', message: "Build Failed - ${env.JOB_NAME} ${env.BUILD_NUMBER} (<${env.BUILD_URL}|Open>)"
-		throw e
 	}
+
+	archive 'build/**'
 }