Obsolete tests removed (openvinotoolkit#5786)

ngraph/python/tests/__init__.py

@@ -51,8 +51,6 @@ def xfail_test(reason="Mark the test as expected to fail", strict=True):
 xfail_issue_35923 = xfail_test(reason="RuntimeError: PReLU without weights is not supported")
 xfail_issue_35925 = xfail_test(reason="Assertion error - reduction ops results mismatch")
 xfail_issue_35927 = xfail_test(reason="RuntimeError: B has zero dimension that is not allowable")
-xfail_issue_36480 = xfail_test(reason="RuntimeError: [NOT_FOUND] Unsupported property dummy_option "
-                               "by CPU plugin")
 xfail_issue_36486 = xfail_test(reason="RuntimeError: HardSigmoid operation should be converted "
                                       "to HardSigmoid_IE")
 xfail_issue_36487 = xfail_test(reason="Assertion error - mvn operator computation mismatch")

ngraph/python/tests/test_ngraph/test_basic.py

@@ -14,7 +14,6 @@
 from ngraph.impl.op import Parameter
 from tests.runtime import get_runtime
 from tests.test_ngraph.util import run_op_node
-from tests import (xfail_issue_36480)
 
 
 def test_ngraph_function_api():
@@ -254,14 +253,6 @@ def test_constant_get_data_unsigned_integer(data_type):
     assert np.allclose(input_data, retrieved_data)
 
 
-@xfail_issue_36480
-def test_backend_config():
-    dummy_config = {"dummy_option": "dummy_value"}
-    # Expect no throw
-    runtime = get_runtime()
-    runtime.set_config(dummy_config)
-
-
 def test_result():
     node = np.array([[11, 10], [1, 8], [3, 4]])
     result = run_op_node([node], ng.result)