diff --git a/packages/relay-runtime/store/RelayRecordSourceMapImpl.js b/packages/relay-runtime/store/RelayRecordSourceMapImpl.js
index 477878dca69f6..05af39feeb8b3 100644
--- a/packages/relay-runtime/store/RelayRecordSourceMapImpl.js
+++ b/packages/relay-runtime/store/RelayRecordSourceMapImpl.js
@@ -61,13 +61,6 @@ class RelayMapRecordSourceMapImpl implements MutableRecordSource {
     return this._records.has(dataID);
   }
 
-  load(
-    dataID: DataID,
-    callback: (error: ?Error, record: ?Record) => void,
-  ): void {
-    callback(null, this.get(dataID));
-  }
-
   remove(dataID: DataID): void {
     this._records.delete(dataID);
   }
diff --git a/packages/relay-runtime/store/RelayRecordSourceObjectImpl.js b/packages/relay-runtime/store/RelayRecordSourceObjectImpl.js
index aa03dccb0cf9f..cbf1fa77e0e5f 100644
--- a/packages/relay-runtime/store/RelayRecordSourceObjectImpl.js
+++ b/packages/relay-runtime/store/RelayRecordSourceObjectImpl.js
@@ -56,13 +56,6 @@ class RelayRecordSourceObjectImpl implements MutableRecordSource {
     return this._records.hasOwnProperty(dataID);
   }
 
-  load(
-    dataID: DataID,
-    callback: (error: ?Error, record: ?Record) => void,
-  ): void {
-    callback(null, this.get(dataID));
-  }
-
   remove(dataID: DataID): void {
     delete this._records[dataID];
   }
diff --git a/packages/relay-runtime/store/RelayStoreTypes.js b/packages/relay-runtime/store/RelayStoreTypes.js
index 6b9fd90ccdbdf..dc7fb7335785a 100644
--- a/packages/relay-runtime/store/RelayStoreTypes.js
+++ b/packages/relay-runtime/store/RelayStoreTypes.js
@@ -190,11 +190,8 @@ export interface RecordSource {
   getRecordIDs(): Array<DataID>;
   getStatus(dataID: DataID): RecordState;
   has(dataID: DataID): boolean;
-  load(
-    dataID: DataID,
-    callback: (error: ?Error, record: ?Record) => void,
-  ): void;
   size(): number;
+  toJSON(): {[DataID]: ?Record};
 }
 
 /**
@@ -205,7 +202,6 @@ export interface MutableRecordSource extends RecordSource {
   delete(dataID: DataID): void;
   remove(dataID: DataID): void;
   set(dataID: DataID, record: Record): void;
-  toJSON(): {[DataID]: ?Record};
 }
 
 /**