remove extra/clear - richterm - "terminal emulator" with support for text fonts and images for plan9

commit 6ddd28f2a637e12ca863ae7b0d0d1215d185c93a
parent c089bab0b8e0c8d7da86b98fd95d278cc90da572
Author: Pavel Renev <an2qzavok@gmail.com>
Date:   Thu, 14 Apr 2022 21:33:55 +0000

remove extra/clear

	richterm "terminal emulator" with support for text fonts and images for plan9
	git clone git://nsmpr.xyz/richterm.git
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