linux/patches: remove cpu-cgroup-v2

Patches for CPU Controller on Control Group v2

===============================================

See Tejun Heo's [explanation][1] for why these patches are currently

out-of-tree.

Generating the patches

-----------------------

In a linux checkout, with remote tc-cgroup pointing to

git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git, your

nixpkgs checkout in the same directory as your linux checkout (or

modify the command accordingly), and setting `ver` to the appropriate

version:

```shell

$ ver=4.7

$ git log --reverse --patch v$ver..remotes/tc-cgroup/cgroup-v2-cpu-v$ver > ../nixpkgs/pkgs/os-specific/linux/kernel/cpu-cgroup-v2-patches/$ver.patch

```

[1]: https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git/tree/Documentation/cgroup-v2-cpu.txt?h=cgroup-v2-cpu

let

  ents = builtins.readDir ./.;

in builtins.listToAttrs (builtins.filter (x: x != null) (map (name: let

  match = builtins.match "(.*)\\.patch" name;

in if match == null then null else {

  name = builtins.head match;

  value = {

    name = "cpu-cgroup-v2-${name}";

    patch = ./. + "/${name}";

  };

}) (builtins.attrNames ents)))

      patch = ./modinst-arg-list-too-long.patch;

    };

  cpu-cgroup-v2 = import ./cpu-cgroup-v2-patches;

  hardened = let

    mkPatch = kernelVersion: { version, sha256, patch }: let src = patch; in {

      name = lib.removeSuffix ".patch" src.name;