matchPullRequestTarget is dead code left behind in loopover-extension/content.js by #7487's issue-page match removal

[JSONbored]

Context

apps/loopover-extension/content.js, lines 16-20, defines matchPullRequestTarget — a function that duplicates what matchGitHubPageTarget already does, minus the kind field.

#7487 removed issue-page matching from matchGitHubPageTarget (the manifest.json content-script match is now pull/* only) and simplified the if (target) guard, but left matchPullRequestTarget behind. Confirmed via git log -p that it's genuinely stranded, not used anywhere in production — it's only re-exported through the __loopoverContentInternals test-hook object (line 195), and apps/loopover-extension has zero test files (unlike its sibling apps/loopover-miner-extension, which has a full test/ directory), so even that test-internals export is unconsumed.

Requirements

• Remove matchPullRequestTarget and its entry in the __loopoverContentInternals export.
• Confirm no other file references it (grep before removing).

Deliverables

• matchPullRequestTarget deleted from content.js.
• __loopoverContentInternals no longer exports it.

Test Coverage Requirements

Dead-code removal with no behavior change — no new test needed; confirm the extension still loads/functions unchanged (existing manual verification convention for this extension, since it has no automated test suite).

Expected Outcome

content.js no longer carries a stranded duplicate of matchGitHubPageTarget's logic from before #7487's simplification.

Links & Resources

• apps/loopover-extension/content.js (lines 16-20 for the dead function, line 195 for its test-internals export)
• fix(extension): drop dead issue-page content-script match #7487 (the change that made this function's logic redundant)

[linear-code]

JSO-5553