chore(experiments): Remove old results endpoint

[danielbachhuber]

Changes

Removes the old experiment results endpoint which isn't in use anymore.

How did you test this code?

Tests should pass. I also verified an existing experiment displayed as expected.

[greptile-apps]

PR Summary

This PR removes the old experiment results endpoint that is no longer in use, along with its supporting functions and related imports.

• Removed /projects/:id/experiments/:experiment_id/results and /projects/:id/experiments/:experiment_id/secondary_results endpoints from ee/clickhouse/views/experiments.py
• Removed supporting functions _calculate_experiment_results, _calculate_secondary_experiment_results, and _experiment_results_cached
• Removed unused imports that were only needed for these functions
• Maintained all core experiment functionality as verified by existing tests in test_clickhouse_experiments.py

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[andehen]

Not in use afaik 👍

Out of curiosity: Do we have requests logs easily available where we could confirm this?

[danielbachhuber]

Out of curiosity: Do we have requests logs easily available where we could confirm this?

@andehen Good question! I discovered this:

https://grafana.prod-us.posthog.dev/explore?schemaVersion=1&panes={"bre":{"datasource":"P8E80F9AEF21F6940","queries":[{"refId":"A","expr":"{app%3D\"posthog-web-django\"} |~ `%2Fexperiments%2F[\\d]%2B%2Fresults`","queryType":"range","datasource":{"type":"loki","uid":"P8E80F9AEF21F6940"},"editorMode":"builder"}],"range":{"from":"now-30d","to":"now"}}}&orgId=1

Interestingly, there are some requests with an interesting pattern:

@jurajmajerik Any ideas where they might be coming from?