rst: Don't fail if task entries unmap fail

We cannot fail at that late stage, as everything is restored
and running. In the worst case (unmap fails) restored task would
have one extra mapping.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

pie/restorer.c

@@ -930,12 +930,7 @@ long __export_restore_task(struct task_restore_core_args *args)
 
 	restore_posix_timers(args);
 
-	ret = sys_munmap(args->task_entries, TASK_ENTRIES_SIZE);
-	if (ret < 0) {
-		ret = ((long)__LINE__ << 16) | ((-ret) & 0xffff);
-		goto core_restore_failed;
-	}
-
+	sys_munmap(args->task_entries, TASK_ENTRIES_SIZE);
 	sys_munmap(args->rst_mem, args->rst_mem_size);
 
 	/*
@@ -955,9 +950,4 @@ core_restore_end:
 	pr_err("Restorer fail %ld\n", sys_getpid());
 	sys_exit_group(1);
 	return -1;
-
-core_restore_failed:
-	ARCH_FAIL_CORE_RESTORE;
-
-	return ret;
 }