Cookbook: Remove duplicate bind

Change-Id: Ic8ededc39e97acf5201b10536df2cbe9dba4c8df
diff --git a/src/main/java/com/googlesource/gerrit/plugins/cookbook/Module.java b/src/main/java/com/googlesource/gerrit/plugins/cookbook/Module.java
index b182159..7edaa03 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/cookbook/Module.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/cookbook/Module.java
@@ -71,8 +71,6 @@
         .to(CommitValidator.class);
     DynamicSet.bind(binder(), NewProjectCreatedListener.class)
         .to(ProjectCreatedListener.class);
-    DynamicSet.bind(binder(), CommitValidationListener.class)
-        .to(CommitValidator.class);
     configurePluginParameters();
   }