GUAC-1109: Do not rely on SHA2(). Handle password hashing in Java.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-mysql/src/main/resources/org/glyptodon/guacamole/auth/jdbc/user/UserMapper.xml

@@ -87,19 +87,6 @@
 
     </select>
 
-    <!-- Select single user by credentials -->
-    <select id="selectOneByCredentials" resultMap="UserResultMap">
-        SELECT
-            user_id,
-            username,
-            password_hash,
-            password_salt
-        FROM guacamole_user
-        WHERE
-                username      = #{username,jdbcType=VARCHAR}
-            AND password_hash = UNHEX(SHA2(CONCAT(#{password,jdbcType=VARCHAR}, HEX(password_salt)), 256))
-    </select>
-
     <!-- Select single user by username -->
     <select id="selectOne" resultMap="UserResultMap">