inline method into decorator

The _test_nCoresPerRun method is a remainder of prior refactoring - as it only contains a single call to another
function, we can remove and inline its content safely

benchexec/test_core_assignment_new.py

@@ -33,7 +33,7 @@ def expect_assignment(
 
     def class_decorator(c) -> callable:
         def decorator_test_assignment(self):
-            self._test_nCoresPerRun(number_cores, expected_assignment, max_threads)
+            self.mainAssertValid(number_cores, expected_assignment, max_threads)
 
         dynamic_test_name = f"test_{number_cores}_cores_assignment"
         setattr(c, dynamic_test_name, decorator_test_assignment)
@@ -159,9 +159,6 @@ def mainAssertValid(self, coreLimit, expectedResult, maxThreads=None):
 
     use_hyperthreading = True
 
-    def _test_nCoresPerRun(self, coreLimit, expected_assignment, max_threads=None):
-        self.mainAssertValid(coreLimit, expected_assignment, max_threads)
-
 
 @expect_assignment(1, [[x] for x in range(8)])
 @expect_assignment(2, [[0, 1], [2, 3], [4, 5], [6, 7]])