Remove some dead stores.
Remove redundant local variable assignments left behind by commit
2fc7af5e966.
Author: Quan Zongliang <quanzongliang@yeah.net>
Reviewed-by: Jacob Champion <pchampion@vmware.com>
Discussion: https://postgr.es/m/
de141d14-4fd6-3148-99bf-
856b71aa948a%40yeah.net