docs/reference: remove mention of DOCKER_NOWARN_KERNEL_VERSION

Support for this environment variable was removed in docker 23.0 in
1240f8b41d

From that patch:

> All regular, non-EOL Linux distros now come with more recent kernels
> out of the box. There may still be users trying to run on kernel 3.10
> or older (some embedded systems, e.g.), but those should be a rare
> exception, which we don't have to take into account.
>
> This patch removes the kernel version check on Linux, and the corresponding
> DOCKER_NOWARN_KERNEL_VERSION environment that was there to skip this
> check.

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Sebastiaan van Stijn 2023-04-12 18:12:08 +02:00
parent b799ab94b8
commit 4a863df57a
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@ -130,8 +130,6 @@ For easy reference, the following list of environment variables are supported
by the `dockerd` command line: by the `dockerd` command line:
* `DOCKER_DRIVER` The graph driver to use. * `DOCKER_DRIVER` The graph driver to use.
* `DOCKER_NOWARN_KERNEL_VERSION` Prevent warnings that your Linux kernel is
unsuitable for Docker.
* `DOCKER_RAMDISK` If set this will disable 'pivot_root'. * `DOCKER_RAMDISK` If set this will disable 'pivot_root'.
* `DOCKER_TMPDIR` Location for temporary Docker files. * `DOCKER_TMPDIR` Location for temporary Docker files.
* `MOBY_DISABLE_PIGZ` Do not use [`unpigz`](https://linux.die.net/man/1/pigz) to * `MOBY_DISABLE_PIGZ` Do not use [`unpigz`](https://linux.die.net/man/1/pigz) to