diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/dict_content.h
deleted file mode 100644
index c264aea..0000000
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/dict_content.h
+++ /dev/null
@@ -1,35 +0,0 @@
-/*
- * Copyright (C) 2013, 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.
- */
-
-#ifndef LATINIME_DICT_CONTENT_H
-#define LATINIME_DICT_CONTENT_H
-
-#include "defines.h"
-
-namespace latinime {
-
-class DictContent {
- public:
-    virtual ~DictContent() {}
-
- protected:
-    DictContent() {}
-
- private:
-    DISALLOW_COPY_AND_ASSIGN(DictContent);
-};
-} // namespace latinime
-#endif /* LATINIME_DICT_CONTENT_H */
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h
index 69a1142..203c790 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/single_dict_content.h
@@ -21,14 +21,13 @@
 #include <cstdio>
 
 #include "defines.h"
-#include "suggest/policyimpl/dictionary/structure/v4/content/dict_content.h"
 #include "suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h"
 #include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
 #include "suggest/policyimpl/dictionary/utils/dict_file_writing_utils.h"
 
 namespace latinime {
 
-class SingleDictContent : public DictContent {
+class SingleDictContent {
  public:
     SingleDictContent(uint8_t *const buffer, const int bufferSize)
             : mExpandableContentBuffer(buffer, bufferSize,
diff --git a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h
index cdf870b..d665961 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/structure/v4/content/sparse_table_dict_content.h
@@ -21,7 +21,6 @@
 #include <cstdio>
 
 #include "defines.h"
-#include "suggest/policyimpl/dictionary/structure/v4/content/dict_content.h"
 #include "suggest/policyimpl/dictionary/structure/v4/ver4_dict_constants.h"
 #include "suggest/policyimpl/dictionary/utils/buffer_with_extendable_buffer.h"
 #include "suggest/policyimpl/dictionary/utils/sparse_table.h"
@@ -29,7 +28,7 @@
 namespace latinime {
 
 // TODO: Support multiple contents.
-class SparseTableDictContent : public DictContent {
+class SparseTableDictContent {
  public:
     AK_FORCE_INLINE SparseTableDictContent(uint8_t *const *buffers, const int *bufferSizes,
             const int sparseTableBlockSize, const int sparseTableDataSize)