diff --git a/src/main/java/teetime/framework/InputPortRemovedListener.java b/src/main/java/teetime/framework/InputPortRemovedListener.java
deleted file mode 100644
index e11c36d76825c1a53ab3b8c0f804588a1abacc89..0000000000000000000000000000000000000000
--- a/src/main/java/teetime/framework/InputPortRemovedListener.java
+++ /dev/null
@@ -1,22 +0,0 @@
-/**
- * Copyright (C) 2015 Christian Wulf, Nelson Tavares de Sousa (http://christianwulf.github.io/teetime)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *         http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package teetime.framework;
-
-public interface InputPortRemovedListener {
-
-	void onInputPortRemoved(Stage stage, InputPort<?> removedInputPort);
-
-}
diff --git a/src/main/java/teetime/framework/OutputPortRemovedListener.java b/src/main/java/teetime/framework/OutputPortRemovedListener.java
deleted file mode 100644
index a97e58fe573219d57ead66485a3ecc8e755eee79..0000000000000000000000000000000000000000
--- a/src/main/java/teetime/framework/OutputPortRemovedListener.java
+++ /dev/null
@@ -1,22 +0,0 @@
-/**
- * Copyright (C) 2015 Christian Wulf, Nelson Tavares de Sousa (http://christianwulf.github.io/teetime)
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *         http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package teetime.framework;
-
-public interface OutputPortRemovedListener {
-
-	void onOutputPortRemoved(Stage stage, OutputPort<?> removedOutputPort);
-
-}