Get some strong helpers first lol or a good hand truck or cart. Measure the tub and measure possible exits to figure out where you will go with it once it's out. Leave the plumbing to the end if you'll need to wash the area or yourselves. Where the walls meet the tub there is a lip that the walls are hiding. You'll have to remove the nails or screws that are through that lip and go into backing or and wall studs . You'll have to remove about 2 inches of the wall to get to them. With the back, sides and also the front of the tub at the floor loose and the path you have measured and decided on clean up the mess then disconnect the drain. If you cant get under the tub to get to the drain pipe unscrew the drain flange inside the tub and unscrew the drain lever cover screws if there is one and remove it. Remove the spout by unscrewing it.Just be careful not to tweak the pipes much or joints feet away could be damaged.If it was possible to do this step at first it's your call.I like to take precautions to prevent leaks which like to turn up when the jobs all buttoned up. If you have room to be safe and have a cutting torch cut the tub up. Thats the easy way. There could be connectons under the tub and if there are undo them. Remove tub.
