chore: remove expired until from django snapshot test

[wantsui]

The until timestamp in the flaky decorator on Django snapshots has been expired since Jan 2024, which was uncovered by #11274

As seen in this failed run: https://gitlab.ddbuild.io/DataDog/apm-reliability/dd-trace-py/-/jobs/742978251, if we remove it, the current failure is on:

meta mismatch on '_dd.base_service': got 'tests.contrib.django' which does not match expected ''.

Checklist

• PR author has checked that all the criteria below are met
• The PR description includes an overview of the change
• The PR description articulates the motivation for the change
• The change includes tests OR the PR description describes a testing strategy
• The PR description notes risks associated with the change, if any
• Newly-added code is easy to change
• The change follows the library release note guidelines
• The change includes or references documentation updates if necessary
• Backport labels are set (if applicable)

Reviewer Checklist

• Reviewer has checked that all the criteria below are met
• Title is accurate
• All changes are related to the pull request's stated goal
• Avoids breaking API changes
• Testing strategy adequately addresses listed risks
• Newly-added code is easy to change
• Release note makes sense to a user of the library
• If necessary, author has acknowledged and discussed the performance implications of this PR as reported in the benchmarks PR comment
• Backport labels are set in a manner that is consistent with the release branch maintenance policy

[github-actions]

CODEOWNERS have been resolved as:

tests/contrib/django/test_django_snapshots.py                           @DataDog/apm-core-python @DataDog/apm-idm-python
tests/snapshots/tests.contrib.django.test_django_snapshots.test_middleware_trace_partial_based_view.json  @DataDog/apm-python

[pr-commenter]

Benchmarks

Benchmark execution time: 2024-12-19 20:49:47

Comparing candidate commit 455c395 in PR branch wantsui/remove-flaky-on-django-snapshot with baseline commit e8aab65 in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 394 metrics, 2 unstable metrics.