Remove duplicate test

Author: msimacek

graalpython/com.oracle.graal.python.test/src/tests/cpyext/__init__.py

@@ -123,7 +123,7 @@ def ccompile(self, name, check_duplicate_name=True):
     lib_file = install_dir / f'{name}{EXT_SUFFIX}'
 
     if check_duplicate_name and available_checksum != cur_checksum and name in compiled_registry:
-        print(f"\n\nWARNING: module with name '{name}' was already compiled, but with different source code. "
+        raise RuntimeError(f"\n\nModule with name '{name}' was already compiled, but with different source code. "
               "Have you accidentally used the same name for two different CPyExtType, CPyExtHeapType, "
               "or similar helper calls? Modules with same name can sometimes confuse the import machinery "
               "and cause all sorts of trouble.\n")

graalpython/com.oracle.graal.python.test/src/tests/cpyext/test_abstract.py

@@ -690,15 +690,6 @@ class TestAbstract(CPyExtTestCase):
         cmpfunc=unhandled_error_compare
     )
 
-    test_PyLong_Check = CPyExtFunction(
-        lambda args: isinstance(args[0], int),
-        _default_unarop_args,
-        resultspec="i",
-        argspec='O',
-        arguments=["PyObject* v"],
-        cmpfunc=unhandled_error_compare
-    )
-
     test_PyNumber_ToBase = CPyExtFunction(
         _reference_tobase,
         lambda: (