systemd: remove unnecessary options

-Dblkid is automatically detected, and other three options are meson
defaults.

chapter08/systemd.xml

@@ -54,16 +54,12 @@
 cd       build
 
 meson --prefix=/usr                 \
-      --sysconfdir=/etc             \
-      --localstatedir=/var          \
       --buildtype=release           \
-      -Dblkid=true                  \
       -Ddefault-dnssec=no           \
       -Dfirstboot=false             \
       -Dinstall-tests=false         \
       -Dldconfig=false              \
       -Dsysusers=false              \
-      -Db_lto=false                 \
       -Drpmmacrosdir=no             \
       -Dhomed=false                 \
       -Duserdb=false                \