Ok this has to be the most undiscoverable feature in any product:

1. Google Slides doesn't have a ruler so if you have a bullet and want to remove it, you still have a hanging indent. The solution is to go the line and hit backspace there is an invisible character there which controls the indenting.
2. One mystery I haven't solved is that in a Google Slides master, I can't seem to figure out a way to get rid of bullets. You can add them to a text box, but in normal mode, clicking again on the bullet button removes the bullet, but in master mode it just shows you all the bullet options.