ports-mgmt/portmaster: fix accidentially left in debug tracing

Remove "set -x" thathad been added to verify the previous fix.

ports-mgmt/portmaster/Makefile

 PORTNAME=	portmaster
-PORTVERSION=	3.28
+PORTVERSION=	3.29
 CATEGORIES=	ports-mgmt
 
 MAINTAINER=	se@FreeBSD.org

ports-mgmt/portmaster/distinfo

-TIMESTAMP = 1701286320
-SHA256 (freebsd-portmaster-3.28_GH0.tar.gz) = 3fd89d76e4bf5c222b0d1f104a49d0f4226e6acd79c9eed28f77042443e7ce5b
-SIZE (freebsd-portmaster-3.28_GH0.tar.gz) = 44723
+TIMESTAMP = 1701339347
+SHA256 (freebsd-portmaster-3.29_GH0.tar.gz) = 6fa2250ae6d2d1c0f4604c276c6c5d9dd336315b3399a84c6e705b8c6d1421fd
+SIZE (freebsd-portmaster-3.29_GH0.tar.gz) = 44717