Use list constructor or built-in method instead of copy module

Lib/packaging/compiler/cygwinccompiler.py

@@ -48,7 +48,6 @@ of GCC (same as cygwin in no-cygwin mode).
 
 import os
 import sys
-import copy
 
 from packaging import logger
 from packaging.compiler.unixccompiler import UnixCCompiler
@@ -172,9 +171,9 @@ class CygwinCCompiler(UnixCCompiler):
              extra_postargs=None, build_temp=None, target_lang=None):
         """Link the objects."""
         # use separate copies, so we can modify the lists
-        extra_preargs = copy.copy(extra_preargs or [])
-        libraries = copy.copy(libraries or [])
-        objects = copy.copy(objects or [])
+        extra_preargs = list(extra_preargs or [])
+        libraries = list(libraries or [])
+        objects = list(objects or [])
 
         # Additional libraries
         libraries.extend(self.dll_libraries)

Lib/packaging/run.py

@@ -5,7 +5,6 @@ import re
 import sys
 import getopt
 import logging
-from copy import copy
 
 from packaging import logger
 from packaging.dist import Distribution
@@ -673,7 +672,7 @@ class Dispatcher:
 
 def main(args=None):
     old_level = logger.level
-    old_handlers = copy(logger.handlers)
+    old_handlers = list(logger.handlers)
     try:
         dispatcher = Dispatcher(args)
         if dispatcher.action is None:

Lib/packaging/util.py

@@ -14,7 +14,6 @@ import zipfile
 import posixpath
 import sysconfig
 import subprocess
-from copy import copy
 from glob import iglob as std_iglob
 from fnmatch import fnmatchcase
 from inspect import getsource
@@ -384,7 +383,7 @@ byte_compile(files, optimize=%r, force=%r,
         elif optimize == 2:
             cmd.insert(1, "-OO")
 
-        env = copy(os.environ)
+        env = os.environ.copy()
         env['PYTHONPATH'] = os.path.pathsep.join(sys.path)
         try:
             spawn(cmd, env=env)