Remove unused import of ModuleGenerator in HttpPluginModule

Change-Id: I63d72275e41e0629cc95ed67b1a5dc670af23a7e
diff --git a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/plugins/HttpPluginModule.java b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/plugins/HttpPluginModule.java
index ba5df51..365a222 100644
--- a/gerrit-httpd/src/main/java/com/google/gerrit/httpd/plugins/HttpPluginModule.java
+++ b/gerrit-httpd/src/main/java/com/google/gerrit/httpd/plugins/HttpPluginModule.java
@@ -16,7 +16,6 @@
 
 import com.google.gerrit.server.cache.CacheModule;
 import com.google.gerrit.server.plugins.HttpModuleGenerator;
-import com.google.gerrit.server.plugins.ModuleGenerator;
 import com.google.gerrit.server.plugins.ReloadPluginListener;
 import com.google.gerrit.server.plugins.StartPluginListener;
 import com.google.inject.internal.UniqueAnnotations;