mount: Don't validate mounts read from proc on restore

Validation means -- check chat we can _restore_ this tree.
Those read from proc can be in any state -- we're going to
umount them (can do anything) and do path resolution (work
for any knots as well).
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

mount.c

@@ -91,12 +91,6 @@ int collect_mount_info(pid_t pid, bool parse)
 			pr_err("Building mount tree %d failed\n", getpid());
 			return -1;
 		}
-
-		if (validate_mounts(mntinfo_tree)) {
-			mntinfo_tree = NULL;
-			pr_err("Validating mount tree %d failed\n", getpid());
-			return -1;
-		}
 	}
 
 	return 0;