diff --git a/src/Repositories/AbstractAccessTokenRepository.php b/src/Repositories/AbstractAccessTokenRepository.php
deleted file mode 100644
index 8c5c5948..00000000
--- a/src/Repositories/AbstractAccessTokenRepository.php
+++ /dev/null
@@ -1,46 +0,0 @@
-<?php
-namespace League\OAuth2\Server\Repositories;
-
-use League\OAuth2\Server\Entities\AccessTokenEntity;
-use League\OAuth2\Server\Entities\AccessTokenEntityInterface;
-use League\OAuth2\Server\Entities\ClientEntityInterface;
-
-abstract class AbstractAccessTokenRepository implements AccessTokenRepositoryInterface
-{
-    /**
-     * Create a new access token
-     *
-     * @param \League\OAuth2\Server\Entities\ClientEntityInterface  $clientEntity
-     * @param \League\OAuth2\Server\Entities\ScopeEntityInterface[] $scopes
-     * @param mixed                                                            $userIdentifier
-     *
-     * @return \League\OAuth2\Server\Entities\AccessTokenEntityInterface
-     */
-    public function getNewToken(ClientEntityInterface $clientEntity, array $scopes, $userIdentifier = null)
-    {
-        return new AccessTokenEntity();
-    }
-
-    /**
-     * Persists a new access token to permanent storage.
-     *
-     * @param \League\OAuth2\Server\Entities\AccessTokenEntityInterface $accessTokenEntity
-     */
-    abstract public function persistNewAccessToken(AccessTokenEntityInterface $accessTokenEntity);
-
-    /**
-     * Revoke an access token.
-     *
-     * @param string $tokenId
-     */
-    abstract public function revokeAccessToken($tokenId);
-
-    /**
-     * Check if the access token has been revoked.
-     *
-     * @param string $tokenId
-     *
-     * @return bool Return true if this token has been revoked
-     */
-    abstract public function isAccessTokenRevoked($tokenId);
-}
diff --git a/src/Repositories/AbstractAuthCodeRepository.php b/src/Repositories/AbstractAuthCodeRepository.php
deleted file mode 100644
index 6bd43e49..00000000
--- a/src/Repositories/AbstractAuthCodeRepository.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-/**
- * OAuth 2.0 Auth code storage abstract class.
- *
- * @author      Alex Bilbie <hello@alexbilbie.com>
- * @copyright   Copyright (c) Alex Bilbie
- * @license     http://mit-license.org/
- *
- * @link        https://github.com/thephpleague/oauth2-server
- */
-namespace League\OAuth2\Server\Repositories;
-
-use League\OAuth2\Server\Entities\AuthCodeEntity;
-use League\OAuth2\Server\Entities\AuthCodeEntityInterface;
-
-/**
- * Auth code storage abstract class.
- */
-abstract class AbstractAuthCodeRepository implements AuthCodeRepositoryInterface
-{
-    /**
-     * Creates a new AuthCode
-     *
-     * @return \League\OAuth2\Server\Entities\AuthCodeEntityInterface
-     */
-    public function getNewAuthCode()
-    {
-        return new AuthCodeEntity();
-    }
-
-    /**
-     * Persists a new auth code to permanent storage.
-     *
-     * @param \League\OAuth2\Server\Entities\AuthCodeEntityInterface $authCodeEntity
-     */
-    abstract public function persistNewAuthCode(AuthCodeEntityInterface $authCodeEntity);
-
-    /**
-     * Revoke an auth code.
-     *
-     * @param string $codeId
-     */
-    abstract public function revokeAuthCode($codeId);
-
-    /**
-     * Check if the auth code has been revoked.
-     *
-     * @param string $codeId
-     *
-     * @return bool Return true if this code has been revoked
-     */
-    abstract public function isAuthCodeRevoked($codeId);
-}
diff --git a/src/Repositories/AbstractRefreshTokenRepository.php b/src/Repositories/AbstractRefreshTokenRepository.php
deleted file mode 100644
index 04748b2d..00000000
--- a/src/Repositories/AbstractRefreshTokenRepository.php
+++ /dev/null
@@ -1,53 +0,0 @@
-<?php
-/**
- * OAuth 2.0 Refresh token storage abstract class.
- *
- * @author      Alex Bilbie <hello@alexbilbie.com>
- * @copyright   Copyright (c) Alex Bilbie
- * @license     http://mit-license.org/
- *
- * @link        https://github.com/thephpleague/oauth2-server
- */
-namespace League\OAuth2\Server\Repositories;
-
-use League\OAuth2\Server\Entities\RefreshTokenEntityInterface;
-use League\OAuth2\Server\Entities\RefreshTokenEntity;
-
-/**
- * Refresh token abstract class.
- */
-abstract class AbstractRefreshTokenRepository implements RefreshTokenRepositoryInterface
-{
-    /**
-     * Creates a new refresh token
-     *
-     * @return RefreshTokenEntityInterface
-     */
-    public function getNewRefreshToken()
-    {
-        return new RefreshTokenEntity();
-    }
-
-    /**
-     * Create a new refresh token_name.
-     *
-     * @param \League\OAuth2\Server\Entities\RefreshTokenEntityInterface $refreshTokenEntity
-     */
-    abstract public function persistNewRefreshToken(RefreshTokenEntityInterface $refreshTokenEntity);
-
-    /**
-     * Revoke the refresh token.
-     *
-     * @param string $tokenId
-     */
-    abstract public function revokeRefreshToken($tokenId);
-
-    /**
-     * Check if the refresh token has been revoked.
-     *
-     * @param string $tokenId
-     *
-     * @return bool Return true if this token has been revoked
-     */
-    abstract public function isRefreshTokenRevoked($tokenId);
-}