Are they rears that screw in and out or fronts that just slide ? 
The wind out one requires a tool 
You can remove the sliding ones by using a brake hose clamp on the flexible hose opening the bleed nipple a little and connecting a foot pump the pressure of the foot pump will pop the cylinder out 
Do it slowly and somewhere clean 
You can use a air line but there’s more control with a foot pump 
Rob