https://bugs.gentoo.org/945037
https://github.com/litespeedtech/lsquic/pull/528/
Remove unused function parameter for C23 compatibility

In C23, `void foo()` is equivalent to `void foo(void)`, which causes a
conflicting type error for lsquic_data_in_error_new.
--- a/src/liblsquic/lsquic_di_error.c
+++ b/src/liblsquic/lsquic_di_error.c
@@ -21,7 +21,7 @@ static const struct data_in *error_data_in_ptr;
 
 
 struct data_in *
-lsquic_data_in_error_new (struct lsquic_conn_public *conn_pub)
+lsquic_data_in_error_new ()
 {
     return (struct data_in *) error_data_in_ptr;
 }