I did,
And everything continues to work fine. So they do not perform an essential functionality...
Code:
chmod 000 /usr/local/libexec/at-spi-bus-launcher
chmod 000 /usr/local/libexec/at-spi2-registryd
chmod 000 /usr/local/libexec/gvfsd
chmod 000 /usr/local/libexec/gvfs-udisks2-volume-monitor
chmod 000 /usr/local/libexec/gvfs-mtp-volume-monitor
chmod 000 /usr/local/libexec/gvfs-gphoto2-volume-monitor
chmod 000 /usr/local/bin/speech-dispatcher