How to remove paint to reveal text?

When you have sreenshot or flat image file without text on separate layer you can not simply remove paint. You cannot even with layered file if text is rasterized/converted to pixels then painted over it.

When text is converted to pixels and painted over, image will loose information about text, whatever is on your screen is everything that image file has stored. As already mentioned there is nothing beneath paint on that image file, expectation or knowledge that there was text can trick you to think you can reveal what was there but that is not possible in situations as already explained above.