pg_regress: Remove unused variable
The restrictedToken handle was set but never read, so remove the
variable and change to a boolean style check to match other uses
of CreateRestrictedProcess().
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/
62A63C81-3893-4E3F-A34E-
2081DF67074E@yesql.se