Remove any furniture or fixtures that might be placed in front of the recessed bath fixture that you want to remove so that they don't become damaged in the process.
Place plastic sheeting or an old drop cloth on the floor underneath the bath fixture to catch any debris.
Cover the edges of the neighboring tiles or the wall with sturdy tape, such as duct tape, to protect it during the process.
Insert a new blade into a grout saw. Saw around the edges of the recessed fixture. You can also use a rotary cutting tool with a mortar-cutting blade to remove the grout.
Insert the edge of a prybar or crowbar between the recessed feature and the nearest tile. Gently pry the recessed feature out and away from the wall. Don't press too hard or you could damage the wall.
Work your way around all the corners of the recessed fixture with your prybar or other tool until all of the sides are loose.
Pull the recessed fixture out of the wall.