To get out as much as possible you would need to disconnect the lines at the master cylinder, and blow some air down them wit the bleed nipple open, then take the master cylinder apart as there will be some left in there as well which won't readily come out.
The just reassemble, bleed master cylinder, then the brakes, all should be well, might as well fit braided lines as well if not already got them, as they improve matters quite a bit.
tabetha