content: remove irrelevant bug documentation

[supermarin]

The aforementioned bug has been resolved in https://golang.org/cl/183991.
Removing it from the blog content reduces cognitive overhead for readers.

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[supermarin]

@googlebot I signed it!

[gopherbot]

This PR (HEAD: b7ec545) has been imported to Gerrit for code review.

Please visit https://go-review.googlesource.com/c/blog/+/277612 to see it.

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[gopherbot]

Message from Go Bot:

Patch Set 1:

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[gopherbot]

Message from Bryan C. Mills:

Patch Set 1: Run-TryBot+1 Code-Review+2

(1 comment)

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Please don’t reply on this GitHub thread. Visit golang.org/cl/277612.
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[gopherbot]

Message from Go Bot:

Patch Set 1:

TryBots beginning. Status page: https://farmer.golang.org/try?commit=aa98a633

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[gopherbot]

Message from Go Bot:

Patch Set 1: TryBot-Result+1

TryBots are happy.

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[gopherbot]

This PR is being closed because golang.org/cl/277612 has been merged.