removed 'complex' type test that depends on 'cdef complex' refering to the Python type

tests/run/builtincomplex.pyx

-
-cimport cython
-
-@cython.test_assert_path_exists('//TupleNode//CoerceToPyTypeNode//AttributeNode')
-def complex_attributes():
-    """
-    >>> complex_attributes()
-    (1.0, 2.0)
-    """
-    cdef complex c = 1+2j
-    return (c.real, c.imag)
-
-@cython.test_assert_path_exists('//TupleNode//CoerceToPyTypeNode//AttributeNode')
-def complex_attributes_assign():
-    """
-    >>> complex_attributes_assign()
-    (10.0, 20.0)
-    """
-    cdef complex c = 1+2j
-    c.real, c.imag = 10, 20
-    return (c.real, c.imag)
-
-@cython.test_assert_path_exists('//TupleNode//CoerceToPyTypeNode//AttributeNode')
-def complex_cstruct_assign():
-    """
-    >>> complex_cstruct_assign()
-    (10.0, 20.0)
-    """
-    cdef complex c = 1+2j
-    cval = &c.cval
-    cval.real, cval.imag = 10, 20
-    return (c.real, c.imag)