Tree structure test changes.

tests/run/type_inference.pyx

@@ -350,8 +350,7 @@ cdef object some_float_value():
 
 
 @cython.test_fail_if_path_exists('//NameNode[@type.is_pyobject = True]')
-@cython.test_assert_path_exists('//InPlaceAssignmentNode/NameNode',
-                                '//NameNode[@type.is_pyobject]',
+@cython.test_assert_path_exists('//NameNode[@type.is_pyobject]',
                                 '//NameNode[@type.is_pyobject = False]')
 @infer_types(None)
 def double_loop():

tests/run/unicode_indexing.pyx

@@ -243,7 +243,6 @@ def index_add(unicode ustring, Py_ssize_t i, Py_ssize_t j):
 
 @cython.test_assert_path_exists("//CoerceToPyTypeNode",
                                 "//IndexNode",
-                                "//InPlaceAssignmentNode",
                                 "//CoerceToPyTypeNode//IndexNode")
 @cython.test_fail_if_path_exists("//IndexNode//CoerceToPyTypeNode")
 def index_concat_loop(unicode ustring):