fix tests (delete sort_nodes from tests)

tests/cidr4_merge/test_cidr4_merger.py

@@ -8,7 +8,6 @@ from vpn_manager.cidr4_merge.cidr4_merger import (
     make_cidr4,
     merge_nodes,
     merge_two_nodes,
-    sort_nodes,
 )
 
 
@@ -41,22 +40,6 @@ def test_make_cidr4():
     assert make_cidr4(520969728, 23) == "31.13.94.0/23"
 
 
-def test_sort_nodes():
-    assert sort_nodes(
-        [
-            (401219072, 24),
-            (2899902464, 19),
-            (400657664, 24),
-            (520969728, 23),
-        ]
-    ) == [
-        (400657664, 24),
-        (401219072, 24),
-        (520969728, 23),
-        (2899902464, 19),
-    ]
-
-
 def test_find_parent():
     assert find_parent((0, 2), (1073741824, 2)) == (0, 1)
     assert find_parent((2147483648, 2), (3221225472, 2)) == (2147483648, 1)