fix: remove unused type ignore from three_values fixture in TestAsyncInMemoryStore (#31895)

Author: mdrxy

libs/core/tests/unit_tests/stores/test_in_memory.py

@@ -24,7 +24,7 @@ async def kv_store(self) -> InMemoryStore:
         return InMemoryStore()
 
     @pytest.fixture
-    def three_values(self) -> tuple[str, str, str]:  # type: ignore[override]
+    def three_values(self) -> tuple[str, str, str]:
         return "value1", "value2", "value3"