symfonyAppPipeline: fix hook stages

vars/hook.groovy

@@ -7,9 +7,9 @@ def call(String name) {
         return
     }
     def hook = load(filepath)
-    if(hook.metaClass.respondsTo(hook, 'exec')) {
+    if (hook.metaClass.respondsTo(hook, 'exec')) {
         hook.exec()
     } else {
         error("Hook script '${filepath}' exists but does not expose an exec() function.")
     }
-}
+}

vars/symfonyAppPipeline.groovy

@@ -6,11 +6,7 @@ def call(String baseImage = 'ubuntu:22.04') {
       checkout(scm)
     }
     stage('Run pre hooks') {
-      steps {
-        script {
-          hook('pre-symfony-app')
-        }
-      }
+      hook('pre-symfony-app')
     }
     stage('Run in Symfony image') {
       def symfonyImage = buildDockerImage(baseImage)
@@ -91,11 +87,7 @@ def call(String baseImage = 'ubuntu:22.04') {
       }
     }
     stage('Run post hooks') {
-      steps {
-        script {
-          hook('post-symfony-app')
-        }
-      }
+      hook('post-symfony-app')
     }
   }
 }