test-framework: add null blk

Signed-off-by: Kamil Gierszewski <kamil.gierszewski@huawei.com>

test_utils/filesystem/symlink.py

@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2019-2021 Intel Corporation
-# Copyright(c) 2023 Huawei Technologies Co., Ltd.
+# Copyright(c) 2023-2024 Huawei Technologies Co., Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 #
 
@@ -9,8 +9,7 @@ from test_tools.fs_utils import (
     readlink,
     create_directory,
     check_if_symlink_exists,
-    check_if_directory_exists,
-    check_if_special_block_exist
+    check_if_directory_exists
 )
 from test_utils.filesystem.file import File
 
@@ -77,12 +76,6 @@ class Symlink(File):
                 raise FileExistsError("Existing symlink points to a different target.")
         elif not create:
             raise FileNotFoundError("Requested symlink does not exist.")
-
-        is_special_block = check_if_special_block_exist(link_path)
-        if is_special_block:
-            if not target or readlink(link_path) == readlink(target):
-                return cls(link_path)
-
         is_dir = check_if_directory_exists(link_path)
         if is_dir:
             raise IsADirectoryError(