cmd api NewWalker Reducing the code makes the code more concise

[wjw1758548031]

cmd api NewWalker Reducing the code makes the code more concise
Fixes #54385

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Message from Ian Lance Taylor:

Patch Set 1:

(1 comment)

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Message from jianwen wang:

Patch Set 1:

(1 comment)

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Message from Ian Lance Taylor:

Patch Set 1:

(1 comment)

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Please don’t reply on this GitHub thread. Visit golang.org/cl/458775.
After addressing review feedback, remember to publish your drafts!