[Backport 2.x] Remove the unused renovate.json5 file

[opensearch-trigger-bot]

Backport e871aea from #3489.

[codecov-commenter]

Codecov Report

Merging #3511 (88e574c) into 2.x (4d1a531) will increase coverage by 0.00%.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##              2.x    #3511   +/-   ##
=======================================
  Coverage   66.44%   66.45%           
=======================================
  Files        3205     3205           
  Lines       61567    61567           
  Branches     9497     9497           
=======================================
+ Hits        40909    40915    +6     
+ Misses      18386    18382    -4     
+ Partials     2272     2270    -2     

Flag	Coverage Δ
Linux	66.39% <ø> (+<0.01%)	⬆️
Windows	66.40% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ic/application/models/sense_editor/sense_editor.ts	65.77% <0.00%> (+0.88%)	⬆️
packages/osd-optimizer/src/node/cache.ts	53.94% <0.00%> (+2.63%)	⬆️
...s/osd-optimizer/src/node/node_auto_tranpilation.ts	87.75% <0.00%> (+4.08%)	⬆️

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[joshuarrrr]

ignoring mend failure/error