Remove errant print statements from tests (Qiskit#13702)

If any `print` is necessary for debugging failed test cases, we probably
ought to reconfigure the test runner's display mechanisms, or use the
built-in configuration of the `unittest` assert methods to produce
better results.

test/python/circuit/test_circuit_data.py

@@ -320,10 +320,6 @@ def test_delitem_slice(self, sli):
 
         del data_list[sli]
         del data[sli]
-        if data_list[sli] != data[sli]:
-            print(f"data_list: {data_list}")
-            print(f"data: {list(data)}")
-
         self.assertEqual(data[sli], data_list[sli])
 
     @ddt.data(

test/python/transpiler/test_vf2_post_layout.py

@@ -267,7 +267,9 @@ def test_2q_circuit_5q_backend_max_trials(self):
             f"is >= configured max trials {max_trials}",
             cm.output,
         )
-        print(pass_.property_set["VF2PostLayout_stop_reason"])
+        self.assertEqual(
+            pass_.property_set["VF2PostLayout_stop_reason"], VF2PostLayoutStopReason.SOLUTION_FOUND
+        )
         self.assertLayout(dag, cmap, pass_.property_set)
         self.assertNotEqual(pass_.property_set["post_layout"], initial_layout)