fix: fix the calculator

calculator/test_calculator.py

@@ -3,7 +3,7 @@ Test module for the calculator module.
 """
 import pytest
 from calculator.calculator import Calculator
-from calculator.operators import STANDARD_OPERATORS, Operator
+from calculator.operators import STANDARD_OPERATORS
 
 
 @pytest.fixture(scope="module", name="setup")
@@ -49,7 +49,7 @@ def test_evaluation(setup):
     """
     Test the evaluation.
     """
-    plus, minus, times, divide, calc = setup
+    _, _, _, divide, calc = setup
     assert calc("1 + 2") == 3
     assert calc("5 - 1") == 4
     assert calc("3 * 2") == 6