Follow these steps to remove Bixby from Android.
Click the Bixby button => Go through the wizard agreeing to as little as possible.
Once you get to the screen with the three dots in the top right corner, select them => Select Radio button for Bixby voice and turn it off => Select button for Bixby button and turn it off.
Bixby has been disabled. Now we will remove from one of the “desktops”. On one of your wallpapers on the homescreen, hold down an empty area to bring up the menu for desktops. Scroll over to the Bixby one (far left) and choose the radio button to disable “Bixby Home”.