Removed dated pre Laravel 5.5 install guides

Author: stevebauman

docs/auth/installation.md

@@ -1,59 +1,7 @@
 # Installation
 
-The installation process slightly differs depending on your  Laravel version. Please look at the install guide with the Laravel version you're using.
-
-## Laravel 5.0 - 5.1
-
-Insert the `AdldapAuthServiceProvider` into your `config/app.php` file:
-
-```php
-Adldap\Laravel\AdldapAuthServiceProvider::class,
-```
-
-Publish the auth configuration:
-
-```bash
-php artisan vendor:publish --provider "Adldap\Laravel\AdldapAuthServiceProvider"
-```
-
-Change the auth driver in `config/auth.php` to `ldap`:
-
-```php
-'driver' => 'ldap',
-```
-
-## Laravel 5.2 - 5.4
-
-Insert the `AdldapAuthServiceProvider` into your `config/app.php` file:
-
-```php
-Adldap\Laravel\AdldapAuthServiceProvider::class,
-```
-
-Publish the auth configuration file:
-
-```bash
-php artisan vendor:publish --provider "Adldap\Laravel\AdldapAuthServiceProvider"
-```
-
-Open your `config/auth.php` configuration file and change the following:
-
-Change the `driver` value inside the `users` authentication provider to `ldap`:
-
-```php
-'providers' => [
-    'users' => [
-        'driver' => 'ldap', // Changed from 'eloquent'
-        'model' => App\User::class,
-    ],
-],
-```
-
-## Laravel 5.5
-
-When using Laravel 5.5, the service providers are registered automatically,
-however you will still need to publish the configuration file using the
-command below:
+To start configuring the authentication driver, you will need
+to publish the configuration file using the command below:
 
 ```bash
 php artisan vendor:publish --provider "Adldap\Laravel\AdldapAuthServiceProvider"