minor #17465 Remove unused imports (Koc)

This PR was merged into the 3.0 branch.

Discussion
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Remove unused imports

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

Commits
-------

b8028f6 Remove unused imports

1 files changed, 0 insertions, 1 deletions

diff --git a/Guard/Provider/GuardAuthenticationProvider.php b/Guard/Provider/GuardAuthenticationProvider.php
index 4347e02..2793674 100644
--- a/Guard/Provider/GuardAuthenticationProvider.php
+++ b/Guard/Provider/GuardAuthenticationProvider.php
@@ -12,7 +12,6 @@
 namespace Symfony\Component\Security\Guard\Provider;
 
 use Symfony\Component\Security\Core\Authentication\Provider\AuthenticationProviderInterface;
-use Symfony\Component\Security\Core\Authentication\Token\AnonymousToken;
 use Symfony\Component\Security\Core\Exception\BadCredentialsException;
 use Symfony\Component\Security\Core\Exception\UsernameNotFoundException;
 use Symfony\Component\Security\Guard\GuardAuthenticatorInterface;