Remove superfluous ;; sequences

[callahad]

Per @Mark-Simulacrum's request in rust-lang/rust#42215 (comment)

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @brson (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

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[alexcrichton]

@bors: r+

[bors]

📌 Commit 76d53d5 has been approved by alexcrichton

[bors]

⌛ Testing commit 76d53d5 with merge 381a4e7...

[bors]

☀️ Test successful - status-appveyor, status-travis
Approved by: alexcrichton
Pushing 381a4e7 to master...