Adds documentation for various functions, removes unused functions (a
couple of simple, very lightly used functions were unDRYed; these could
go back the other way across all shell scripts if necessary). TODO items
noted for follow-up refactoring.
Fixes: #14275
Relates-to: #14269
Build-bot: build all
Test-bot: skip
Keyman makes it possible for you to type in any language
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instantly in your web browser. Create keyboard layouts with Keyman Developer and
share them with the community in the keyboards
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Keyman is an open source project distributed under the MIT license.