Remove `EqualsEmptyHandler`

[vjik]

Q	A
Is bugfix?	✔️
New feature?	❌
Breaks BC?	❌
Fixed issues

[what-the-diff[bot]]

PR Summary

• Removal of Unused Class In the CriteriaHandler.php file, we removed the EqualsEmptyHandler class as it was no longer necessary. This means that the code has become cleaner and more streamlined, potentially improving the system's performance and maintainability.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 75.00%. Comparing base (c72481c) to head (5400ba1).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #47 +/- ## ============================================ + Coverage 74.03% 75.00% +0.96% + Complexity 130 126 -4 ============================================ Files 22 21 -1 Lines 312 304 -8 ============================================ - Hits 231 228 -3 + Misses 81 76 -5 ```

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