run modernize -fix ./...

Using golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize

+ some manual cleanup in libpod/lock/shm/shm_lock_test.go as it
  generated an unused variable
+ restored one removed comment

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

pkg/systemd/notifyproxy/notifyproxy_test.go

@@ -48,7 +48,7 @@ func TestWaitAndClose(t *testing.T) {
 
 	sendMessage(t, proxy, daemon.SdNotifyReady+"\nsomething else\n")
 	done := func() bool {
-		for i := 0; i < 10; i++ {
+		for i := range 10 {
 			select {
 			case err := <-ch:
 				require.NoError(t, err, "Waiting should succeed")