[squash] livepatch: rebase the annotated sample

Note: squash with ("livepatch: Add sample livepatch module")

commit 958ef1e ("livepatch: Simplify API by removing registration
step") removed klp_register_patch(), klp_unregister_patch(), and
klp_disable_patch(), so rebase the sample module accordingly.

[joe: rebase for v5.0]

Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>

samples/livepatch/livepatch-annotated-sample.c

@@ -90,22 +90,11 @@ static struct klp_patch patch = {
 
 static int livepatch_init(void)
 {
-	int ret;
-
-	ret = klp_register_patch(&patch);
-	if (ret)
-		return ret;
-	ret = klp_enable_patch(&patch);
-	if (ret) {
-		WARN_ON(klp_unregister_patch(&patch));
-		return ret;
-	}
-	return 0;
+	return klp_enable_patch(&patch);
 }
 
 static void livepatch_exit(void)
 {
-	WARN_ON(klp_unregister_patch(&patch));
 }
 
 module_init(livepatch_init);