Dont clean the built in node

Jenkinsfile

@@ -1,5 +1,7 @@
 pipeline {
-    agent none
+    agent {
+        label 'agent2'
+    }
 
     triggers {
         cron("59 23 * * 1") // Clean up every monday
@@ -10,19 +12,7 @@ pipeline {
     }
 
     stages {
-        stage('Clean docker on agent2') {
-            agent {
-                label 'agent2'
-            }
-            steps {
-                sh 'docker system prune -a -f'
-                sh 'docker network prune -f'
-            }
-        }
-        stage('Clean docker on built-in-node') {
-            agent {
-                label 'built_in_node'
-            }
+        stage('Clean docker images') {
             steps {
                 sh 'docker system prune -a -f'
                 sh 'docker network prune -f'