Fix deepsource RVV-B0013 Unused method receiver

[kevindiu]

Signed-off-by: kevindiu kevindiujp@gmail.com

Description:

SSIA

Related Issue:

Versions:

• Go Version: 1.19.2
• Docker Version: 20.10.8
• Kubernetes Version: 1.22.0
• NGT Version: 1.14.8

Checklist:

• I have read the CONTRIBUTING document and completed our CLA agreement.
• I have checked open Pull Requests for the similar feature or fixes?

Special notes for your reviewer:

[vdaas-ci]

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[codecov]

Codecov Report

Base: 50.23% // Head: 30.57% // Decreases project coverage by -19.65% ⚠️

Coverage data is based on head (eea89a7) compared to base (97eed29).
Patch coverage: 32.91% of modified lines in pull request are covered.

❗ Current head eea89a7 differs from pull request most recent head 43bbb44. Consider uploading reports for the commit 43bbb44 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1832       +/-   ##
===========================================
- Coverage   50.23%   30.57%   -19.66%     
===========================================
  Files         231      367      +136     
  Lines       13464    33777    +20313     
===========================================
+ Hits         6764    10329     +3565     
- Misses       6499    23039    +16540     
- Partials      201      409      +208     

Impacted Files	Coverage Δ
cmd/tools/cli/loadtest/main.go	0.00% <ø> (ø)
hack/benchmark/assets/x1b/loader.go	0.00% <ø> (ø)
hack/benchmark/internal/assets/dataset.go	0.00% <ø> (ø)
hack/benchmark/internal/operation/insert.go	0.00% <ø> (ø)
hack/benchmark/internal/operation/operation.go	0.00% <ø> (ø)
hack/benchmark/internal/operation/option.go	0.00% <ø> (ø)
hack/benchmark/internal/operation/remove.go	0.00% <ø> (ø)
hack/benchmark/internal/operation/search.go	0.00% <ø> (ø)
hack/benchmark/internal/operation/util.go	0.00% <ø> (ø)
...ck/benchmark/internal/starter/gateway/vald/vald.go	0.00% <0.00%> (ø)
... and 267 more

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[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	7b5127e
Status:	⚡️  Build in progress...

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[hlts2]

LGTM