fix: clarify pytest-qt dependency in tox.ini for Frame Removal tests

Author: macromeer

tox.ini

@@ -33,10 +33,8 @@ passenv =
 extras =
     testing
 deps =
-    # Only install the testing dependencies here; main deps come from the package itself
-    pytest>=7.0.0
-    pytest-cov
-    pytest-timeout
+    # Additional test dependencies beyond what's in [project.optional-dependencies.testing]
+    # pytest-qt is already in testing extras, but listed here for explicitness
     pytest-qt
 commands =
     # Run full test suite but skip slow tests (e.g., heavy Spotiflow detection) on all platforms by default.