refactor: remove unused imports (#4566)

# Description of Changes

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## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [x] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

Signed-off-by: Balázs Szücs <bszucs1209@gmail.com>

app/proprietary/src/main/java/stirling/software/proprietary/security/filter/JwtAuthenticationFilter.java

@@ -2,7 +2,6 @@ package stirling.software.proprietary.security.filter;
 
 import static stirling.software.common.util.RequestUriUtils.isStaticResource;
 import static stirling.software.proprietary.security.model.AuthenticationType.*;
-import static stirling.software.proprietary.security.model.AuthenticationType.SAML2;
 
 import java.io.IOException;
 import java.sql.SQLException;

app/proprietary/src/test/java/stirling/software/proprietary/security/service/UserServiceTest.java

@@ -1,8 +1,6 @@
 package stirling.software.proprietary.security.service;
 
 import static org.junit.jupiter.api.Assertions.*;
-import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.*;
 
 import java.sql.SQLException;