Remove flysystem aws-s3 and rackspace packages

The following sub dependencies were removed as a result of this change:
  - Removing ralouphie/getallheaders (3.0.3)
  - Removing rackspace/php-opencloud (v1.16.0)
  - Removing mtdowling/jmespath.php (2.4.0)
  - Removing mikemccabe/json-patch-php (0.1.0)
  - Removing league/flysystem-rackspace (1.0.5)
  - Removing league/flysystem-aws-s3-v3 (1.0.23)
  - Removing guzzlehttp/psr7 (1.6.1)
  - Removing guzzlehttp/promises (v1.3.1)
  - Removing guzzlehttp/guzzle (6.3.3)
  - Removing guzzle/guzzle (v3.8.1)
  - Removing aws/aws-sdk-php (3.107.1)

Author: amosfolz

app/sprinkles/core/composer.json

@@ -34,9 +34,7 @@
         "illuminate/filesystem": "5.8.*",
         "league/csv": "^9.2.1",
         "league/flysystem": "~1.0",
-        "league/flysystem-aws-s3-v3": "~1.0",
         "league/flysystem-cached-adapter": "~1.0",
-        "league/flysystem-rackspace": "~1.0",
         "league/flysystem-sftp": "~1.0",
         "monolog/monolog": "^1",
         "phpmailer/phpmailer": "^6.0.7",

app/sprinkles/core/config/default.php

@@ -188,6 +188,11 @@
                 /*
                  * Amazon S3 Bucket Config. Config should go in .env file. For help, see :
                  * https://aws.amazon.com/en/blogs/security/wheres-my-secret-access-key/
+                 *
+                 * As of version 4.3, https://github.com/thephpleague/flysystem-aws-s3-v3
+                 * is required inside a custom Sprinkle to use this filesystem.
+                 *
+                 * Include thephpleague/flysystem-aws-s3-v3 in a custom Sprinkle to use.
                  */
                 's3' => [
                     'driver' => 's3',
@@ -197,6 +202,25 @@
                     'bucket' => getenv('AWS_BUCKET') ?: '',
                     'url'    => getenv('AWS_URL') ?: '',
                 ],
+
+                /*
+                 * Rackspace Config. Config should go in .env file. see :
+                 * https://laravel.com/docs/5.8/filesystem#configuration
+                 *
+                 * As of version 4.3, https://github.com/thephpleague/flysystem-rackspace
+                 * is required inside a custom Sprinkle to use this filesystem.
+                 *
+                 * Include thephpleague/flysystem-rackspace in a custom Sprinkle to use.
+                 */
+                'rackspace' => [
+                  'driver'    => 'rackspace',
+                  'username'  => getenv('RACKSPACE_USERNAME') ?: '',
+                  'key'       => getenv('RACKSPACE_KEY') ?: '',
+                  'container' => getenv('RACKSPACE_CONTAINER') ?: '',
+                  'endpoint'  => getenv('RACKSPACE_ENDPOINT') ?: '',
+                  'region'    => getenv('RACKSPACE_REGION') ?: '',
+                  'url_type'  => getenv('RACKSPACE_URL_TYPE') ?: '',
+                ],
            ],
         ],