doc: remove unneeded min/max fields deprecations

doc: remove unneeded min/max fields deprecations

It was announced that `min` and `max` fields and variables in public
headers will be renamed to avoid clash with `min` and `max` macros
defined in Windows headers. However, it is unnecessary, because these
are function-like macros, which are not expanded unless the next token
is an opening brace. It cannot happen for integer fields and variables.
Remove the deprecation notices.

Fixes: c4379ee599ef ("doc: announce API changes for Windows compatibility")

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>