SG-38306 Python2 Removal - Part 2 - Easy ones

[julien-lang]

• Remove future imports
• Cleanup super prototype
• six.iter....
• Remove calls to six.text_type and six.binary_type
• Remove calls to ensure_bytes, ensure_text, ensure_strings

PR orders

• SG-38306 Python2 Removal - Part 1 - Import order #398
• SG-38306 Python2 Removal - Part 2 - Easy ones #399
• SG-38306 Python2 Removal - Part 3 - Cleanup imports #400
• SG-38306 Python2 Removal - Part 4 - Mimetypes module #401
• SG-38306 Python2 Removal - Part 5 - Remove deprecated backported mock module #402
• SG-38306 Python2 Removal - Part 6 - Remove python2 from httplib2 module #403
• SG-38306 Python2 Removal - Part 7 - various #404
• SG-38306 Python2 Removal - Part 8 - Remove deprecated ensure_ascii parameter from SG object #405
• SG-38306 Python2 Removal - Part 9 - six module #395
• SG-38306 Remove Python 2 - Part 10 - SSL #372

[Copilot]

Pull Request Overview

This PR continues the removal of Python 2 compatibility code by dropping __future__ imports, cleaning up super() calls, and replacing six utilities and custom ensure_* calls with native Python 3 constructs.

• Removed Python 2 shims (__future__, six, ensure_*) across tests and core shotgun.py
• Simplified super() usage everywhere
• Replaced binary/text conversions with native bytes/str and updated payload encoding logic

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
tests/test_proxy.py	Simplified super() calls
tests/test_mockgun.py	Simplified super() calls
tests/test_client.py	Replaced ensure_* in b64encode and test payloads
tests/test_api_long.py	Removed __future__ import, swapped six.iteritems
tests/test_api.py	Removed __future__, replaced six.text_type/binary; simplified paths and type checks
tests/base.py	Simplified super() calls in base test classes
shotgun_api3/shotgun.py	Removed six iteration, replaced ensure_*, reworked encoding/decoding, updated HTTP form encoding
docs/reference.rst	Dropped outdated note about Python 2 text handling

Comments suppressed due to low confidence (1)

shotgun_api3/shotgun.py:4765

• New branches handle bytes keys and values in form encoding; consider adding unit tests for encode() that pass bytes and non-str types to ensure correct behavior.

        for key, value in params:

[carlos-villavicencio-adsk]

LGTM

The base branch was changed.