Revert "doc: os.uptime() temporary bug notice"

This reverts commit b9ffb82.

The bug was fixed in libuv 1.41.0.

Refs: libuv/libuv#3072

PR-URL: #38494
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

doc/api/os.md

@@ -368,18 +368,6 @@ changes:
 
 Returns the system uptime in number of seconds.
 
-The value returned can be inaccurate in some
-rare virtualization cases. The issue arises when the virtualized
-guest instance shares the kernel with the host system.
-Due to the fact that libuv uses a syscall that
-provides host's uptime instead of guest's
-uptime on OpenVZ, `os.uptime()` may also provide
-erroneous result.
-
-Please refer to <https://github.com/nodejs/node/issues/36244> and
-<https://github.com/libuv/libuv/issues/3068> for an exploration of
-this issue, until it is resolved by libuv.
-
 ## `os.userInfo([options])`
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