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>

test/e2e/exec_test.go

@@ -348,7 +348,7 @@ var _ = Describe("Podman exec", func() {
 		Expect(setup).Should(Exit(0))
 		Expect(setup.ErrorToString()).To(ContainSubstring("The input device is not a TTY. The --tty and --interactive flags might not work properly"))
 
-		for i := 0; i < 5; i++ {
+		for range 5 {
 			session := podmanTest.Podman([]string{"exec", "-ti", "test1", "true"})
 			session.WaitWithDefaultTimeout()
 			Expect(session).Should(ExitCleanly())