noTint()
Removes the current tint set by tint().
noTint() restores images to their original colors.
Examples

local img
-- Load the image.
function setup()
size(100, 100)
img = loadImage("assets/flower.jpg")
windowTitle("noTint example")
-- Left.
-- Tint with a CSS color string.
tint('red')
image(img, 0, 0, 50, 100)
-- Right.
-- Remove the tint.
noTint()
image(img, 50, 0, 50, 100)
describe('Two images of a flower side-by-side. The image on the left has a red tint.')
end