Drop some function overloads in Base64.h. This is a step towards std::span adoption and using more consistent typing for representing bytes.
Pull request: https://github.com/WebKit/WebKit/pull/28953
Committed 279251@main (a101a7b4075a): <https://commits.webkit.org/279251@main> Reviewed commits have been landed. Closing PR #28953 and removing active labels.
<rdar://problem/128654103>