refactor smck verification test (remove usless superclass)

Author: hossam26644

verification.py

@@ -4528,9 +4528,10 @@ def test_smc_num_trees(self):
         pyplot.close("all")
 
 
-class SmckvsSMCK(Test):
+class SmcKTest(Test):
     """
-    Tests for the SMC(k) approximation coalescent against the SMC(k) model.
+    Tests for the SMCK model.
+    SMC(0) is compared against rejection sampling SMC (SmcApproxCoalescent).
     """
 
     models = {
@@ -4653,12 +4654,6 @@ def _run(self, **kwargs):
         self.plot_SmcKApprox_smcK_stats(df)
         self.plot_tree_intervals(df)
 
-
-class SmcKTest(SmckvsSMCK):
-    """
-    Tests for the SMC(0) model against rejection sampling.
-    """
-
     def test_smc_k_oldest_time(self):
         """
         Runs the check for number of trees using the CLI.