index/suffixarray: use built-in clear to simplify code

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"sais2.go" is regenerated by the command "go generate ./...".

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Message from Gopher Robot:

Patch Set 1:

(1 comment)

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This PR (HEAD: d285183) has been imported to Gerrit for code review.

Please visit Gerrit at https://go-review.googlesource.com/c/go/+/572198.

Important tips:

• Don't comment on this PR. All discussion takes place in Gerrit.
• You need a Gmail or other Google account to log in to Gerrit.
• To change your code in response to feedback:
  • Push a new commit to the branch used by your GitHub PR.
  • A new "patch set" will then appear in Gerrit.
  • Respond to each comment by marking as Done in Gerrit if implemented as suggested. You can alternatively write a reply.
  • Critical: you must click the blue Reply button near the top to publish your Gerrit responses.
  • Multiple commits in the PR will be squashed by GerritBot.
• The title and description of the GitHub PR are used to construct the final commit message.
  • Edit these as needed via the GitHub web interface (not via Gerrit or git).
  • You should word wrap the PR description at ~76 characters unless you need longer lines (e.g., for tables or URLs).
• See the Sending a change via GitHub and Reviews sections of the Contribution Guide as well as the FAQ for details.

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Message from kyose chang:

Patch Set 2:

(1 comment)

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Message from qiulaidongfeng:

Patch Set 2: Commit-Queue+1

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Message from Go LUCI:

Patch Set 2:

Dry run: CV is trying the patch.

Bot data: {"action":"start","triggered_at":"2024-03-18T12:35:48Z","revision":"e06614b40e68a96c9a585a129ecd05333aadd832"}

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Message from qiulaidongfeng:

Patch Set 2: -Commit-Queue

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Message from Go LUCI:

Patch Set 2:

This CL has passed the run

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Message from Go LUCI:

Patch Set 2: LUCI-TryBot-Result+1

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Message from Robert Griesemer:

Patch Set 2: Code-Review+1

(1 comment)

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Message from Ian Lance Taylor:

Patch Set 2:

(1 comment)

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Message from Robert Griesemer:

Patch Set 2: Code-Review+2

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Message from David Chase:

Patch Set 2: Code-Review+1

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This PR is being closed because golang.org/cl/572198 has been merged.