Remove Python 2 handling code (#2098)

* Remove Python 2 update modal

* Remove Python 2 handling code

* Remove backports dependencies

* Remove uses of future and __future__

* Fix import

* Remove requirements

* Update lib folder

* Clean up imports and blank lines

---------

Co-authored-by: JonnyWong16 <9099342+JonnyWong16@users.noreply.github.com>

lib/future/backports/datetime.py

@@ -689,7 +689,7 @@ class date(object):
 
     @classmethod
     def fromordinal(cls, n):
-        """Contruct a date from a proleptic Gregorian ordinal.
+        """Construct a date from a proleptic Gregorian ordinal.
 
         January 1 of year 1 is day 1.  Only the year, month and day are
         non-zero in the result.

lib/future/backports/email/_header_value_parser.py

@@ -2867,7 +2867,7 @@ def parse_content_type_header(value):
         _find_mime_parameters(ctype, value)
         return ctype
     ctype.append(token)
-    # XXX: If we really want to follow the formal grammer we should make
+    # XXX: If we really want to follow the formal grammar we should make
     # mantype and subtype specialized TokenLists here.  Probably not worth it.
     if not value or value[0] != '/':
         ctype.defects.append(errors.InvalidHeaderDefect(

lib/future/backports/email/parser.py

@@ -26,7 +26,7 @@ class Parser(object):
         textual representation of the message.
 
         The string must be formatted as a block of RFC 2822 headers and header
-        continuation lines, optionally preceeded by a `Unix-from' header.  The
+        continuation lines, optionally preceded by a `Unix-from' header.  The
         header block is terminated either by the end of the string or by a
         blank line.
 
@@ -92,7 +92,7 @@ class BytesParser(object):
         textual representation of the message.
 
         The input must be formatted as a block of RFC 2822 headers and header
-        continuation lines, optionally preceeded by a `Unix-from' header.  The
+        continuation lines, optionally preceded by a `Unix-from' header.  The
         header block is terminated either by the end of the input or by a
         blank line.
 

lib/future/backports/http/cookiejar.py

@@ -1851,7 +1851,7 @@ def lwp_cookie_str(cookie):
 class LWPCookieJar(FileCookieJar):
     """
     The LWPCookieJar saves a sequence of "Set-Cookie3" lines.
-    "Set-Cookie3" is the format used by the libwww-perl libary, not known
+    "Set-Cookie3" is the format used by the libwww-perl library, not known
     to be compatible with any browser, but which is easy to read and
     doesn't lose information about RFC 2965 cookies.
 

lib/future/backports/test/support.py

@@ -28,7 +28,6 @@ import importlib
 # import collections.abc    # not present on Py2.7
 import re
 import subprocess
-import imp
 import time
 try:
     import sysconfig
@@ -341,37 +340,6 @@ def rmtree(path):
         if error.errno != errno.ENOENT:
             raise
 
-def make_legacy_pyc(source):
-    """Move a PEP 3147 pyc/pyo file to its legacy pyc/pyo location.
-
-    The choice of .pyc or .pyo extension is done based on the __debug__ flag
-    value.
-
-    :param source: The file system path to the source file.  The source file
-        does not need to exist, however the PEP 3147 pyc file must exist.
-    :return: The file system path to the legacy pyc file.
-    """
-    pyc_file = imp.cache_from_source(source)
-    up_one = os.path.dirname(os.path.abspath(source))
-    legacy_pyc = os.path.join(up_one, source + ('c' if __debug__ else 'o'))
-    os.rename(pyc_file, legacy_pyc)
-    return legacy_pyc
-
-def forget(modname):
-    """'Forget' a module was ever imported.
-
-    This removes the module from sys.modules and deletes any PEP 3147 or
-    legacy .pyc and .pyo files.
-    """
-    unload(modname)
-    for dirname in sys.path:
-        source = os.path.join(dirname, modname + '.py')
-        # It doesn't matter if they exist or not, unlink all possible
-        # combinations of PEP 3147 and legacy pyc and pyo files.
-        unlink(source + 'c')
-        unlink(source + 'o')
-        unlink(imp.cache_from_source(source, debug_override=True))
-        unlink(imp.cache_from_source(source, debug_override=False))
 
 # On some platforms, should not run gui test even if it is allowed
 # in `use_resources'.

lib/future/backports/xmlrpc/client.py

@@ -134,10 +134,11 @@ from __future__ import (absolute_import, division, print_function,
 from future.builtins import bytes, dict, int, range, str
 
 import base64
-# Py2.7 compatibility hack
-base64.encodebytes = base64.encodestring
-base64.decodebytes = base64.decodestring
 import sys
+if sys.version_info < (3, 9):
+    # Py2.7 compatibility hack
+    base64.encodebytes = base64.encodestring
+    base64.decodebytes = base64.decodestring
 import time
 from datetime import datetime
 from future.backports.http import client as http_client
@@ -1251,7 +1252,7 @@ class Transport(object):
     # Send HTTP request.
     #
     # @param host Host descriptor (URL or (URL, x509 info) tuple).
-    # @param handler Targer RPC handler (a path relative to host)
+    # @param handler Target RPC handler (a path relative to host)
     # @param request_body The XML-RPC request body
     # @param debug Enable debugging if debug is true.
     # @return An HTTPConnection.