minor #13054 [2.3] CS Fixes (GrahamCampbell)

This PR was squashed before being merged into the 2.3 branch (closes #13054).

Discussion
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[2.3] CS Fixes

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | N/A
| License       | MIT
| Doc PR        | N/A

##### This pull request provides some cs fixes.

Commits
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b521c20 [2.3] CS Fixes

Author: fabpot

Tests/DependencyInjection/Fixtures/UserProvider/DummyProvider.php

@@ -10,7 +10,6 @@ class DummyProvider implements UserProviderFactoryInterface
 {
     public function create(ContainerBuilder $container, $id, $config)
     {
-        
     }
 
     public function getKey()
@@ -20,6 +19,5 @@ public function getKey()
 
     public function addConfiguration(NodeDefinition $node)
     {
-        
     }
 }