net/http/httputil: remove redundant pw.Close() call in DumpRequestOut

[1911860538]

pw.Close() is already deferred earlier in DumpRequestOut.

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Message from Gopher Robot:

Patch Set 1:

(1 comment)

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Message from 黄志文:

Patch Set 1:

(1 comment)

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Message from Damien Neil:

Patch Set 1: Commit-Queue+1

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Message from Go LUCI:

Patch Set 1:

Dry run: CV is trying the patch.

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Message from Damien Neil:

Patch Set 1: -Commit-Queue

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Patch Set 1:

This CL has passed the run

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Patch Set 1: LUCI-TryBot-Result+1

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Message from Damien Neil:

Patch Set 1: Code-Review+2

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Patch Set 1: Code-Review+1

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Message from Sean Liao:

Patch Set 1: Auto-Submit+1 Code-Review+1

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This PR is being closed because golang.org/cl/696415 has been merged.