Remove sendSharedHistoryKeys while we will only share latest messages

Author: ariskotsomitopoulos

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/crypto/CryptoService.kt

@@ -164,11 +164,6 @@ interface CryptoService {
      */
     fun prepareToEncrypt(roomId: String, callback: MatrixCallback<Unit>)
 
-    /**
-     * Share all existing inbound sessions to the provided userId devices
-     */
-    fun sendSharedHistoryKeys(roomId: String, userId: String)
-
     /**
      * Share all inbound sessions of the last chunk messages to the provided userId devices
      */