fix bad import path for cmd/podman/utils

Libpod or packages under /pkg should never import from /cmd/...
This will quickly result in import cycles and weird code paths.
Also there is no reason to use this special code we can just use
syscall.SIGHUB as SIGNAL.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

cmd/podman/utils/signals_linux.go

@@ -1,15 +0,0 @@
-//go:build !windows
-// +build !windows
-
-package utils
-
-import (
-	"os"
-
-	"golang.org/x/sys/unix"
-)
-
-// Platform specific signal synonyms
-var (
-	SIGHUP os.Signal = unix.SIGHUP
-)

cmd/podman/utils/signals_windows.go

@@ -1,15 +0,0 @@
-//go:build windows
-// +build windows
-
-package utils
-
-import (
-	"os"
-
-	"golang.org/x/sys/windows"
-)
-
-// Platform specific signal synonyms
-var (
-	SIGHUP os.Signal = windows.SIGHUP
-)

pkg/domain/infra/runtime_libpod.go

@@ -9,9 +9,9 @@ import (
 	"os"
 	"os/signal"
 	"sync"
+	"syscall"
 
 	"github.com/containers/common/pkg/cgroups"
-	"github.com/containers/podman/v4/cmd/podman/utils"
 	"github.com/containers/podman/v4/libpod"
 	"github.com/containers/podman/v4/pkg/domain/entities"
 	"github.com/containers/podman/v4/pkg/namespaces"
@@ -375,7 +375,7 @@ func ParseIDMapping(mode namespaces.UsernsMode, uidMapSlice, gidMapSlice []strin
 func StartWatcher(rt *libpod.Runtime) {
 	// Setup the signal notifier
 	ch := make(chan os.Signal, 1)
-	signal.Notify(ch, utils.SIGHUP)
+	signal.Notify(ch, syscall.SIGHUP)
 
 	go func() {
 		for {