diff --git a/azkaban-common/src/main/java/azkaban/jobtype/JobTypeManager.java b/azkaban-common/src/main/java/azkaban/jobtype/JobTypeManager.java
index 59f8612..2f56836 100644
--- a/azkaban-common/src/main/java/azkaban/jobtype/JobTypeManager.java
+++ b/azkaban-common/src/main/java/azkaban/jobtype/JobTypeManager.java
@@ -20,9 +20,6 @@ import azkaban.jobExecutor.JavaProcessJob;
import azkaban.jobExecutor.Job;
import azkaban.jobExecutor.NoopJob;
import azkaban.jobExecutor.ProcessJob;
-import azkaban.jobExecutor.PythonJob;
-import azkaban.jobExecutor.RubyJob;
-import azkaban.jobExecutor.ScriptJob;
import azkaban.jobExecutor.utils.JobExecutionException;
import azkaban.utils.Props;
import azkaban.utils.PropsUtils;
@@ -93,9 +90,6 @@ public class JobTypeManager {
plugins.addPluginClass("command", ProcessJob.class);
plugins.addPluginClass("javaprocess", JavaProcessJob.class);
plugins.addPluginClass("noop", NoopJob.class);
- plugins.addPluginClass("python", PythonJob.class);
- plugins.addPluginClass("ruby", RubyJob.class);
- plugins.addPluginClass("script", ScriptJob.class);
}
// load Job Types from jobtype plugin dir
