Remove unused argument of ATAddForeignConstraint
Commit
0325d7a5957b made this unused but forgot to remove it. Do so now.
Author: Amit Langote <amitlangote09@gmail.com>
Discussion: https://postgr.es/m/
209c99fe-b9a2-94f4-cd68-
a8304186a09e@lab.ntt.co.jp