Removing unnecessary hack from the error handling chapter

[defuz]

r? @steveklabnik

[rust-highfive]

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

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[steveklabnik]

You have an unrelated change in AUTHORS.txt, but r=me after! Thank you.

[defuz]

@steveklabnik What do you mean "unrelated change"? I just wanted to change the nickname to my real name in AUTHORS.txt. Should I create a separate request for this?

[steveklabnik]

Sorry, your PR made no mention of it, and so it seemed to be out of the blue :) If that's something you meant to do, that's fine.

@bors: r+ rollup

[bors]

📌 Commit 1ebdb73 has been approved by steveklabnik

[steveklabnik]

(and thanks a lot for finding this!)

[bors]

⌛ Testing commit 1ebdb73 with merge b14dc5b...

[bors]

☀️ Test successful - auto-linux-32-nopt-t, auto-linux-32-opt, auto-linux-64-debug-opt, auto-linux-64-nopt-t, auto-linux-64-opt, auto-linux-64-x-android-t, auto-linux-cross-opt, auto-linux-musl-64-opt, auto-mac-32-opt, auto-mac-64-nopt-t, auto-mac-64-opt, auto-win-gnu-32-nopt-t, auto-win-gnu-32-opt, auto-win-gnu-64-nopt-t, auto-win-gnu-64-opt, auto-win-msvc-32-opt, auto-win-msvc-64-opt