chore(metrics): Remove legacy post process metrics

[roggenkemper]

removes the legacy events.time-to-post-process and events.saved_to_post_processed since we have events.since_received now. Merge after all dashboards/widgets/monitors are moved to new metric

[codecov]

❌ 5 Tests Failed:

Tests completed	Failed	Passed	Skipped
25581	5	25576	216

View the top 3 failed test(s) by shortest run time

tests.sentry.tasks.test_post_process.PostProcessGroupFeedbackTest::test_time_to_process_metric

Stack Traces | 3.12s run time

#x1B[1m#x1B[.../sentry/tasks/test_post_process.py#x1B[0m:206: in test_time_to_process_metric
    metric_timing_mock.assert_any_call(
#x1B[1m#x1B[.../hostedtoolcache/Python/3.13.1.../x64/lib/python3.13/unittest/mock.py#x1B[0m:1048: in assert_any_call
    raise AssertionError(
#x1B[1m#x1B[31mE   AssertionError: timing('events.time-to-post-process', <ANY>, instance=<ANY>, tags={'occurrence_type': <ANY>}) call not found#x1B[0m

tests.sentry.tasks.test_post_process.PostProcessGroupGenericTest::test_time_to_process_metric

Stack Traces | 3.33s run time

#x1B[1m#x1B[.../sentry/tasks/test_post_process.py#x1B[0m:206: in test_time_to_process_metric
    metric_timing_mock.assert_any_call(
#x1B[1m#x1B[.../hostedtoolcache/Python/3.13.1.../x64/lib/python3.13/unittest/mock.py#x1B[0m:1048: in assert_any_call
    raise AssertionError(
#x1B[1m#x1B[31mE   AssertionError: timing('events.time-to-post-process', <ANY>, instance=<ANY>, tags={'occurrence_type': <ANY>}) call not found#x1B[0m

tests.sentry.tasks.test_post_process.PostProcessGroupAggregateEventTest::test_time_to_process_metric

Stack Traces | 4.41s run time

#x1B[1m#x1B[.../sentry/tasks/test_post_process.py#x1B[0m:206: in test_time_to_process_metric
    metric_timing_mock.assert_any_call(
#x1B[1m#x1B[.../hostedtoolcache/Python/3.13.1.../x64/lib/python3.13/unittest/mock.py#x1B[0m:1048: in assert_any_call
    raise AssertionError(
#x1B[1m#x1B[31mE   AssertionError: timing('events.time-to-post-process', <ANY>, instance=<ANY>, tags={'occurrence_type': <ANY>}) call not found#x1B[0m

tests.sentry.tasks.test_post_process.PostProcessGroupPerformanceTest::test_time_to_process_metric

Stack Traces | 4.6s run time

#x1B[1m#x1B[.../sentry/tasks/test_post_process.py#x1B[0m:206: in test_time_to_process_metric
    metric_timing_mock.assert_any_call(
#x1B[1m#x1B[.../hostedtoolcache/Python/3.13.1.../x64/lib/python3.13/unittest/mock.py#x1B[0m:1048: in assert_any_call
    raise AssertionError(
#x1B[1m#x1B[31mE   AssertionError: timing('events.time-to-post-process', <ANY>, instance=<ANY>, tags={'occurrence_type': <ANY>}) call not found#x1B[0m

tests.sentry.tasks.test_post_process.PostProcessGroupErrorTest::test_time_to_process_metric

Stack Traces | 7.78s run time

#x1B[1m#x1B[.../sentry/tasks/test_post_process.py#x1B[0m:206: in test_time_to_process_metric
    metric_timing_mock.assert_any_call(
#x1B[1m#x1B[.../hostedtoolcache/Python/3.13.1.../x64/lib/python3.13/unittest/mock.py#x1B[0m:1048: in assert_any_call
    raise AssertionError(
#x1B[1m#x1B[31mE   AssertionError: timing('events.time-to-post-process', <ANY>, instance=<ANY>, tags={'occurrence_type': <ANY>}) call not found#x1B[0m

To view more test analytics, go to the Test Analytics Dashboard
_{📋 Got 3 mins? Take this short survey to help us improve Test Analytics.}