systemd: remove patch

flake.nix

@@ -335,12 +335,6 @@
                   prev.callPackage "${patchedStableSrc}/pkgs/by-name/sy/syncstorage-rs/package.nix"
                     { };
               })
-              # NOTE: systemd patch is applied via `systemd.package` in the module
-              # list below, not via an overlay. An overlay replaces pkgs.systemd
-              # for every consumer, which cascades through udev-check-hook and
-              # causes the entire closure (fish, e2fsprogs, valkey, …) to rebuild
-              # and re-run flaky test suites in the sandbox. `systemd.package`
-              # only injects the patched systemd into the runtime init chain.
             ];
             nixpkgs.config.allowUnfreePredicate =
               pkg:
@@ -349,26 +343,6 @@
               ];
           }
 
-          # Runtime-only systemd patch: reset FreezerState on inactive/failed
-          # transitions so a SIGKILL to a frozen unit doesn't strand
-          # FreezerState=frozen (unrecoverable without a reboot, upstream issue
-          # #38517). PR #38528 closed only the watchdog path; this closes
-          # systemctl kill / OOM / segfault paths too.
-          #
-          # Applied via systemd.package, not via overlay, so pkgs.systemd stays
-          # untouched for every other consumer — no udev-check-hook cascade,
-          # no fish/e2fsprogs/valkey rebuild, no flaky-test fallout.
-          (
-            { pkgs, ... }:
-            {
-              systemd.package = pkgs.systemd.overrideAttrs (old: {
-                patches = (old.patches or [ ]) ++ [
-                  ./patches/systemd/0001-core-unit-reset-freezer-state-on-inactive-failed.patch
-                ];
-              });
-            }
-          )
-
           lanzaboote.nixosModules.lanzaboote
           arr-init.nixosModules.default
           (import "${nixpkgs-p2pool-module}/nixos/modules/services/networking/p2pool.nix")

patches/systemd/0001-core-unit-reset-freezer-state-on-inactive-failed.patch

@@ -1,48 +0,0 @@
-From: Simon Gardling <titaniumtown@proton.me>
-Date: 2026-04-21
-Subject: [PATCH] core/unit: reset freezer state when unit becomes inactive/failed
-
-When a frozen unit is killed via anything that delivers SIGKILL outside
-systemd's normal deactivation path (`systemctl kill --signal=KILL`,
-`kill -9`, the OOM killer, a segfault), the service transitions to
-failed or inactive correctly, but `u->freezer_state` is never reset.
-This leaves the unit permanently stuck at FreezerState=frozen:
-
-  - `systemctl thaw` refuses with "Unit is not active".
-  - `systemctl start`/`restart` refuses with
-    "Cannot perform operation on frozen unit".
-  - `reset-failed`, `daemon-reload`, `daemon-reexec`, and `revert` do
-    not clear the state.
-
-The only way to recover a persistent unit in this state is to reboot.
-
-Reset the freezer state to FREEZER_RUNNING whenever a unit transitions
-to an inactive or failed state, and cancel any pending freeze/thaw dbus
-reply that will never complete. The cgroup is pruned immediately after
-this point, so there is nothing left to freeze; the "running" state is
-the correct neutral state for a dead unit. On restart, the unit will
-pick up its freezer state from the cgroup hierarchy again.
-
-This complements PR #38528 (stop/reset watchdog on freeze/thaw) by
-addressing the general SIGKILL path instead of just the watchdog-
-initiated kill.
----
---- a/src/core/unit.c
-+++ b/src/core/unit.c
-@@ -2754,6 +2754,16 @@
-                 SET_FLAG(u->markers,
-                          (1u << UNIT_MARKER_NEEDS_RELOAD)|(1u << UNIT_MARKER_NEEDS_RESTART),
-                          false);
-+
-+                /* If the unit was frozen (or in a freezer transition) when it became inactive/failed,
-+                 * reset the freezer state to running. The cgroup is about to be pruned; leaving the
-+                 * state stuck at frozen would prevent the unit from ever being started, thawed, or
-+                 * cleared without rebooting PID 1. Also cancel any pending freeze/thaw dbus reply. */
-+                if (u->freezer_state != FREEZER_RUNNING) {
-+                        unit_set_freezer_state(u, FREEZER_RUNNING);
-+                        (void) bus_unit_send_pending_freezer_message(u, /* canceled= */ true);
-+                }
-+
-                 unit_prune_cgroup(u);
-                 unit_unlink_state_files(u);
-         } else if (ns != os && ns == UNIT_RELOADING)