diff --git a/operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/CacheKeyMapper.java b/operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/CacheKeyMapper.java
deleted file mode 100644
index 3e1a4f9b14..0000000000
--- a/operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/CacheKeyMapper.java
+++ /dev/null
@@ -1,15 +0,0 @@
-/*
- * Copyright Java Operator SDK Authors
- *
- * 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.
- */
diff --git a/operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/UpdatableCache.java b/operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/UpdatableCache.java
deleted file mode 100644
index debaf8d74b..0000000000
--- a/operator-framework-core/src/main/java/io/javaoperatorsdk/operator/processing/event/source/UpdatableCache.java
+++ /dev/null
@@ -1,24 +0,0 @@
-/*
- * Copyright Java Operator SDK Authors
- *
- * 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 io.javaoperatorsdk.operator.processing.event.source;
-
-import io.javaoperatorsdk.operator.processing.event.ResourceID;
-
-public interface UpdatableCache<T> extends Cache<T> {
-  T remove(ResourceID key);
-
-  void put(ResourceID key, T resource);
-}