chore: remove subscribe to all products feature flag

[zlwaterfield]

Problem

Changes

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

How did you test this code?

[posthog-bot]

📸 UI snapshots have been updated

30 snapshot changes in total. 0 added, 30 modified, 0 deleted:

• chromium: 0 added, 24 modified, 0 deleted (diff for shard 1, diff for shard 2)
• webkit: 0 added, 6 modified, 0 deleted (diff for shard 2)

Triggered by this commit.

👉 Review this PR's diff of snapshots.