Can the cord be removed from the Flair 58 brew head (to clean/make non-electric)?

Unless you have the Quick Disconnect electrical assembly (released May 2023), then the cord attached to the cylinder is non-removable. Do not expose it to water, or pull in an attempt to remove. You will damage the electrical parts. 

If you have the Quick Disconnect electrical assembly, then you can disconnect the electrical components from your cylinder and cap the exposed opening.