diff --git a/src/main/java/JettyLauncher.java b/src/main/java/JettyLauncher.java
index 28653b5..94525fd 100644
--- a/src/main/java/JettyLauncher.java
+++ b/src/main/java/JettyLauncher.java
@@ -134,17 +134,6 @@
         return new File(System.getProperty("user.home"), ".gitbucket");
     }
 
-//    private static void deleteDirectory(File dir){
-//        for(File file: dir.listFiles()){
-//            if(file.isFile()){
-//                file.delete();
-//            } else if(file.isDirectory()){
-//                deleteDirectory(file);
-//            }
-//        }
-//        dir.delete();
-//    }
-
     private static Handler addStatisticsHandler(Handler handler) {
         // The graceful shutdown is implemented via the statistics handler.
         // See the following: https://bugs.eclipse.org/bugs/show_bug.cgi?id=420142
diff --git a/src/main/scala/gitbucket/core/service/SystemSettingsService.scala b/src/main/scala/gitbucket/core/service/SystemSettingsService.scala
index 4b6e611..248d122 100644
--- a/src/main/scala/gitbucket/core/service/SystemSettingsService.scala
+++ b/src/main/scala/gitbucket/core/service/SystemSettingsService.scala
@@ -220,24 +220,6 @@
   private val LdapSsl = "ldap.ssl"
   private val LdapKeystore = "ldap.keystore"
 
-//  private def getEnvironmentVariable[A](key: String): Option[A] = {
-//    val value = System.getenv("GITBUCKET_" + key.toUpperCase.replace('.', '_'))
-//    if(value != null && value.nonEmpty){
-//      Some(convertType(value)).asInstanceOf[Option[A]]
-//    } else {
-//      None
-//    }
-//  }
-//
-//  private def getSystemProperty[A](key: String): Option[A] = {
-//    val value = System.getProperty("gitbucket." + key)
-//    if(value != null && value.nonEmpty){
-//      Some(convertType(value)).asInstanceOf[Option[A]]
-//    } else {
-//      None
-//    }
-//  }
-
   private def getValue[A: ClassTag](props: java.util.Properties, key: String, default: A): A = {
     getSystemProperty(key).getOrElse(getEnvironmentVariable(key).getOrElse {
       defining(props.getProperty(key)){ value =>
@@ -262,11 +244,4 @@
     })
   }
 
-//  private def convertType[A: ClassTag](value: String) =
-//    defining(implicitly[ClassTag[A]].runtimeClass){ c =>
-//      if(c == classOf[Boolean])  value.toBoolean
-//      else if(c == classOf[Int]) value.toInt
-//      else value
-//    }
-
 }