Removed unused property from Image Storage

[adamwojs]

Question	Answer
JIRA issue	-
Type	improvement
Target Ibexa version	v4.5
BC breaks	no

\Ibexa\Core\FieldType\Image\ImageStorage::$deprecationWarner is reported as unused by static code analysis.

Checklist:

• Provided PR description.
• Tested the solution manually.
• Provided automated test coverage.
• Checked that target branch is set correctly (main for features, the oldest supported for bugs).
• Ran PHP CS Fixer for new PHP code (use $ composer fix-cs).
• Asked for a review (ping @ibexa/engineering).

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[Steveb-p]

Strange, I thought we had PHPStan already enabled in core, and I don't see a baseline change here 🤔

[konradoboza]

Strange, I thought we had PHPStan already enabled in core, and I don't see a baseline change here 🤔

Had the same thought, but isn't that related to the low PHPStan level which is the case for core?

[Steveb-p]

Strange, I thought we had PHPStan already enabled in core, and I don't see a baseline change here 🤔

Had the same thought, but isn't that related to the low PHPStan level which is the case for core?

If so, then we should increase it as soon as possible.