Remove double test user.

tests/datafiller/data_users.php

@@ -141,18 +141,6 @@ $users[] = array(
     'active' => 1
 );
 
-$users[] = array(
-    'username' => 'agarcia',
-    'pass' => 'agarcia',
-    'firstname' => 'Alan',
-    'lastname' => 'Garcia',
-    'status' => 1,
-    'auth_source' => 'platform',
-    'email' => 'agarcia@example.com',
-    'creator_id' => 1,
-    'active' => 1
-);
-
 $users[] = array(
     'username' => 'jbrion',
     'pass' => 'jbrion',