Can you eliminate the assist steering cylinder and all the mess of hoses without converting to manual steering?
If you eliminate the slave cylinder and the hoses you have converted to manual steering but you still have the pump and the control valve in place so steering will be imprecise and not powered.
This is what you will want if ditching the hydraulic assist cylinder
Before going manual look into other power steering options. The borgeson conversion is a popular one, Also options like Electronic power steering too
Epas performance is in my car and I like it…not cheap