sysutils/tracker3: drop unused Meson options after 2c352e0f7328

meson.build:1:0: ERROR: Unknown options: "network_manager"

https://gitlab.gnome.org/GNOME/tracker/-/commit/d9c80789540b

PR: 259080
Reported by: antoine (via exp-run)
Regressed by: https://github.com/mesonbuild/meson/commit/dbf2ace6ca1c