fix: remove instant repain method when resizing #212
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In #194 (comment), we found that both wayland and x11 are struggle to render when resizing. I also noticed this weeks ago and tried to find the root cause. And it turned out to be the
repaint_synchronouslymethod when resizing. It can block the loop if there are too many messages which results in flickering or flashing. Since we now have our own compositor and I have better control on when to render, this method could be removed already.