Remove all user agent checks for MSIE or documentMode #10014
Merged
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This removes all checks of MSIE in the user agent string, and all checks of documentMode to verify which IE version is being used, as these browsers are long since unsupported.
Most of these changes are specific to tests or devmode, but there is also a change to simplify Throwable slightly (allowing it to work in node.js and other non-browser environments), and simplification of startup user agent checks.