fix: Robustify event listener cleanup

[sentry]

Fixes SPLITS-TEAMS-BH. The issue was that: Content script's detachProviderEvents attempts removeListener on this.provider which is null due to cleanup race condition.

• Wrapped removeListener calls with a try...catch block.
• Prevents errors during cleanup when the provider might be in an indeterminate state (e.g., during window unload).
• Improves the robustness of event handler removal.

This fix was generated by Seer in Sentry, triggered by Greg Rolwes. 👁️ Run ID: 11915706

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[gregfromstl]

@r0ohafza apparently you have to give it feeback in sentry’s UI and it opens an entirely new PR