future.standard_library.install_aliases() is a no-op on Python3 anyway.

--- a/chirp/chirp_common.py
+++ b/chirp/chirp_common.py
@@ -14,7 +14,6 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from builtins import bytes
-from future import standard_library
 
 import base64
 import json
@@ -1920,7 +1919,6 @@
 def urlretrieve(url, fn):
     """Grab an URL and save it in a specified file"""
 
-    standard_library.install_aliases()
     import urllib.request
     import urllib.error
 
--- a/setup.py
+++ b/setup.py
@@ -12,7 +12,6 @@
           'pyserial',
           'requests',
           'six',
-          'future',
           'importlib-resources;python_version<"3.10"',
           'yattag',
       ],