hotfix: remove return representation header

[toopay]

Description

The preferred return representation interferes with RLS in some cases, making it difficult to optimize performance and leading to potential inconsistencies in certain scenarios.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Flag	Coverage Δ
-race	72.24% <ø> (+0.04%)	⬆️
-tags "sonic avx"	72.23% <ø> (+0.08%)	⬆️
-tags go_json	72.23% <ø> (+0.03%)	⬆️
-tags nomsgpack	72.23% <ø> (+0.06%)	⬆️
go-1.21	71.56% <ø> (+0.03%)	⬆️
go-1.22	72.23% <ø> (+0.02%)	⬆️
macos-latest	72.25% <ø> (+0.03%)	⬆️
ubuntu-latest	72.24% <ø> (+0.01%)	⬆️

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Files with missing lines	Coverage Δ
controller.go	59.45% <ø> (+0.53%)	⬆️

... and 1 file with indirect coverage changes