Revert "cri: make read-only mounts recursively read-only"

Revert PR 9713, as it appeared to break the compatibility too much
https://github.com/kubernetes/enhancements/pull/3858#issuecomment-1925441072

This reverts commit b2f254fff0.

> Conflicts:
>	internal/cri/opts/spec_linux_opts.go

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

internal/cri/config/config_kernel_linux.go

@@ -41,13 +41,3 @@ func ValidateEnableUnprivileged(ctx context.Context, c *RuntimeConfig) error {
 	}
 	return nil
 }
-
-var kernelSupportsRro bool
-
-func init() {
-	var err error
-	kernelSupportsRro, err = kernelGreaterEqualThan(kernel.KernelVersion{Kernel: 5, Major: 12})
-	if err != nil {
-		panic(fmt.Errorf("check current system kernel version error: %w", err))
-	}
-}