Simplify some of the buffer impl

[AdamGS]

Summary

Remove a PartialEq impl we don't use and can be expressed with as_ref + derive Clone which generates identical code.

API Changes

None

Testing

Existing tests

[codspeed-hq]

Merging this PR will not alter performance

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 1 improved benchmark
❌ 1 regressed benchmark
✅ 1249 untouched benchmarks

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

	Mode	Benchmark	BASE	HEAD	Efficiency
❌	Simulation	chunked_varbinview_canonical_into[(100, 100)]	273.2 µs	307.9 µs	-11.28%
⚡	Simulation	chunked_varbinview_opt_canonical_into[(1000, 10)]	225.1 µs	187.8 µs	+19.87%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.

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_{Comparing adamg/buffer-simplify (6bfe545) with develop (fa4245e)}