diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/Persister.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/Persister.kt
deleted file mode 100644
index 87dc2a60..00000000
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/Persister.kt
+++ /dev/null
@@ -1,15 +0,0 @@
-package im.vector.matrix.android.api.persitence
-
-import android.arch.paging.PagedList
-
-interface Persister<DATA, KEY> {
-
-    fun put(data: DATA)
-
-    fun remove(data: DATA)
-
-    fun get(id: KEY): DATA?
-
-    fun getAll(): PagedList<DATA>
-
-}
\ No newline at end of file
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/Query.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/Query.kt
deleted file mode 100644
index 5275c185..00000000
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/Query.kt
+++ /dev/null
@@ -1,11 +0,0 @@
-package im.vector.matrix.android.api.persitence
-
-import im.vector.matrix.android.api.util.Cancelable
-
-interface Query<DATA> {
-
-    fun find(): DATA
-
-    fun subscribe(observer: QueryDataObserver<DATA>): Cancelable
-
-}
\ No newline at end of file
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/QueryBuilder.kt b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/QueryBuilder.kt
deleted file mode 100644
index c2663978..00000000
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/QueryBuilder.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package im.vector.matrix.android.api.persitence
-
-interface QueryBuilder<DATA, QUERY : Query<DATA>> {
-
-    fun build(): QUERY
-
-}
\ No newline at end of file
diff --git a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/QueryDataObserver.java b/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/QueryDataObserver.java
deleted file mode 100644
index fda584e0..00000000
--- a/matrix-sdk-android/src/main/java/im/vector/matrix/android/api/persitence/QueryDataObserver.java
+++ /dev/null
@@ -1,5 +0,0 @@
-package im.vector.matrix.android.api.persitence;
-
-public interface QueryDataObserver<DATA> {
-    void onData(DATA data);
-}
\ No newline at end of file