tests: drop dead pre-3.10 version guards

With the minimum supported version now Python 3.10, the `version_info`
early-return in test_frame and the `skipIf(sys.version_info < (3, 8))`
guard in test_flusher are always false/never-skip. Remove them and the
now-unused `sys` / `version_info` imports.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: PetrHeinz

tests/test_flusher.py

@@ -1,7 +1,6 @@
 # coding: utf-8
 from __future__ import print_function, unicode_literals
 import mock
-import sys
 import time
 import threading
 import unittest
@@ -179,8 +178,6 @@ def uploader(frame):
         self.assertEqual(self.upload_calls, 1)
         self.assertFalse(fw.should_run)
 
-    # test relies on overriding excepthook which is available from 3.8+
-    @unittest.skipIf(sys.version_info < (3, 8), "Test skipped because overriding excepthook is only available on Python 3.8+")
     def test_shutdown_dont_raise_exception_in_thread(self):
         original_excepthook = threading.excepthook
         threading.excepthook = mock.Mock()

tests/test_frame.py

@@ -3,7 +3,6 @@
 from logtail.frame import create_frame
 from logtail.handler import LogtailHandler
 from logtail.helpers import LogtailContext
-from sys import version_info
 import datetime
 import unittest
 import logging
@@ -17,9 +16,6 @@ def test_create_frame_happy_path(self):
         # ISO timestamp must end with timezone info
         self.assertTrue(frame['dt'].endswith("+00:00"))
 
-        # These tests require Python >= 3.7
-        if version_info.major == 2 or version_info.minor <= 6:
-            return
         # Sent date matches log record date
         date_ref = datetime.datetime.utcfromtimestamp(log_record.created).replace(tzinfo=datetime.timezone.utc)
         date_sent = datetime.datetime.fromisoformat(frame['dt'])