fix deepsource: [RVV-B0013] Unused method receiver

[datelier]

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:

[hlts2]

LGTM

[vdaas-ci]

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[codecov]

Codecov Report

Base: 30.56% // Head: 30.49% // Decreases project coverage by -0.07% ⚠️

Coverage data is based on head (8147d46) compared to base (31b1abf).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1852      +/-   ##
==========================================
- Coverage   30.56%   30.49%   -0.08%     
==========================================
  Files         367      367              
  Lines       33823    33823              
==========================================
- Hits        10339    10315      -24     
- Misses      23072    23094      +22     
- Partials      412      414       +2     

Impacted Files	Coverage Δ
pkg/gateway/filter/usecase/vald.go	0.00% <0.00%> (ø)
...ent/core/ngt/service/vqueue/undeleted_index_map.go	62.29% <0.00%> (-14.76%)	⬇️
internal/backoff/backoff.go	71.28% <0.00%> (-1.99%)	⬇️
pkg/agent/core/ngt/service/option.go	89.57% <0.00%> (-1.85%)	⬇️
internal/worker/worker.go	82.30% <0.00%> (-1.54%)	⬇️
internal/core/algorithm/ngt/ngt.go	63.93% <0.00%> (+0.64%)	⬆️
internal/worker/queue.go	100.00% <0.00%> (+1.26%)	⬆️
...nt/core/ngt/service/vqueue/uninserted_index_map.go	73.65% <0.00%> (+3.22%)	⬆️

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[cloudflare-workers-and-pages]

Deploying with    Cloudflare Pages

Latest commit:	8147d46
Status:	✅  Deploy successful!
Preview URL:	https://432c6a42.vald.pages.dev
Branch Preview URL:	https://refactoring-rvv-b0013-unused.vald.pages.dev

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