deprecation(io): rework deprecations #4197
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This change reworks
std/io
deprecations by bringing the removal version forward to v0.215.0 from v1, and providing alternative solutions for advanced I/O use.It seems that the wide-use of
copy()
,readAll()
,writeAll()
andBuffer
justified having a removal version of v1. But now that these APIs have been undeprecated, I think it's reasonable to remove the other, more advanced, but less-usedstd/io
APIs sooner.