Revert "Fix IE11 sniffing. Fixes #17311."

This reverts commit f58c0e19ce509398985908688a768c8fb41191b8.

(cherry picked from commit 477d62923e7cd1e32799395301f21c008dc55de6)
Correct detection of focusin support

Fixes #17599

(cherry picked from commit e245ce5c80b85351642fd1ffc18a2d77bbbb0770)
Add Microsoft-recommended UA sniff for IE11

Fixes #17311

(cherry picked from commit 28c2050cbb7f69daa57bd66e3b740a16bb19fd75)
Remove dumb speed test that compares against an old API we will never restore

Fixes #11200

(cherry picked from commit a3dd7a47aa01315e601525b0d8217a8408237149)
Support unprefixed pointer events in dojo/touch

Refs #17600

(cherry picked from commit de651e625d9d2dc9220e7a02647689a4299777d5)
Add Trident UA to match every other UA

Refs #17311

(cherry picked from commit bbe72ecd13f5604802b2498f3623e7c5961069f4)