tools: remove the dependency on the future package

tools/ci/python_packages/idf_http_server_test/adder.py

@@ -3,12 +3,9 @@
 # SPDX-FileCopyrightText: 2018-2022 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Apache-2.0
 
-from __future__ import print_function, unicode_literals
-
 import argparse
 import http.client
 import logging
-from builtins import range, str
 
 
 def start_session(ip, port):

tools/ci/python_packages/idf_http_server_test/client.py

@@ -3,13 +3,10 @@
 # SPDX-FileCopyrightText: 2018-2022 Espressif Systems (Shanghai) CO LTD
 # SPDX-License-Identifier: Apache-2.0
 
-from __future__ import print_function, unicode_literals
-
 import argparse
 import errno
 import http.client
 import logging
-from builtins import str
 
 
 def verbose_print(verbosity, *args):

tools/ci/python_packages/idf_http_server_test/test.py

@@ -118,8 +118,6 @@
 #    - Simple GET on /hello/restart_results (returns the leak results)
 
 
-from __future__ import division, print_function
-
 import argparse
 import http.client
 import logging
@@ -129,7 +127,6 @@ import string
 import sys
 import threading
 import time
-from builtins import object, range, str
 
 _verbose_ = False