diff --git a/tools/dicttool/Android.mk b/tools/dicttool/Android.mk
index 13d7c37af..42659253a 100644
--- a/tools/dicttool/Android.mk
+++ b/tools/dicttool/Android.mk
@@ -42,8 +42,6 @@ LATINIME_TESTS_SRC_DIR := $(LATINIME_LOCAL_DIR)/tests/src/com/android/inputmetho
 # a significant part of the dependencies are mocked in the compat/ directory, with empty or
 # nearly-empty implementations, for parts that we don't use in Dicttool.
 LATINIME_SRC_FILES_FOR_DICTTOOL := \
-        event/Combiner.java \
-        event/Event.java \
         latin/BinaryDictionary.java \
         latin/DicTraverseSession.java \
         latin/Dictionary.java \
diff --git a/tools/dicttool/compat/com/android/inputmethod/event/CombinerChain.java b/tools/dicttool/compat/com/android/inputmethod/event/CombinerChain.java
deleted file mode 100644
index c4457a1b7..000000000
--- a/tools/dicttool/compat/com/android/inputmethod/event/CombinerChain.java
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * 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 com.android.inputmethod.event;
-
-import java.util.ArrayList;
-
-/**
- * Compatibility class that stands in for the combiner chain in LatinIME.
- *
- * This is not used by dicttool, it's just needed by the dependency chain.
- */
-// TODO: there should not be a dependency to this in dicttool, so there
-// should be a sensible way to separate them cleanly.
-public class CombinerChain {
-    private StringBuilder mComposingWord;
-    public CombinerChain(final String initialText, final Combiner... combinerList) {
-        mComposingWord = new StringBuilder(initialText);
-    }
-
-    public Event processEvent(final ArrayList<Event> previousEvents, final Event newEvent) {
-        return newEvent;
-    }
-
-    public void applyProcessedEvent(final Event event) {
-        mComposingWord.append(event.getTextToCommit());
-    }
-
-    public CharSequence getComposingWordWithCombiningFeedback() {
-        return mComposingWord;
-    }
-
-    public void reset() {
-        mComposingWord.setLength(0);
-    }
-
-    public static Combiner[] createCombiners(final String spec) {
-        // Dicttool never uses a combiner at all, so we just return a zero-sized array.
-        return new Combiner[0];
-    }
-}