metropolis/cli/pkg/context: replace with signal.NotifyContext

Change-Id: I457ccb83c7e25988755bb9463a8c83fc328a722b
Reviewed-on: https://review.monogon.dev/c/monogon/+/3081
Tested-by: Jenkins CI
Reviewed-by: Serge Bazanski <serge@monogon.tech>
diff --git a/cloud/bmaas/scruffy/cmd/main.go b/cloud/bmaas/scruffy/cmd/main.go
index e838834..b675fda 100644
--- a/cloud/bmaas/scruffy/cmd/main.go
+++ b/cloud/bmaas/scruffy/cmd/main.go
@@ -3,9 +3,10 @@
 import (
 	"context"
 	"flag"
+	"os"
+	"os/signal"
 
 	"source.monogon.dev/cloud/bmaas/scruffy"
-	clicontext "source.monogon.dev/metropolis/cli/pkg/context"
 )
 
 func main() {
@@ -13,7 +14,7 @@
 	s.Config.RegisterFlags()
 	flag.Parse()
 
-	ctx := clicontext.WithInterrupt(context.Background())
+	ctx, _ := signal.NotifyContext(context.Background(), os.Interrupt)
 	s.Start(ctx)
 	<-ctx.Done()
 }