Remove vec slice encodable binary sv2

[bit-aloo]

closes: #2217

[GitGab19]

Clanker finding, non-blocking:

Remove the stale BYTES mapping from the documentation. The PR removes the implementations that made raw byte vectors encodable, but both the crate documentation and README still advertise [u8] <-> BYTES. Users following that documentation will encounter missing trait implementations. Remove those rows or explain that BYTES is handled by framing context rather than binary_sv2.

[bit-aloo]

Clanker finding, non-blocking:

Remove the stale BYTES mapping from the documentation. The PR removes the implementations that made raw byte vectors encodable, but both the crate documentation and README still advertise [u8] <-> BYTES. Users following that documentation will encounter missing trait implementations. Remove those rows or explain that BYTES is handled by framing context rather than binary_sv2.

Thanks, and also added the reason why we are removing it.