Remove now unnecessary -ms-viewport and -ms-overflow-style directives (#27789)

Edge/Mobile appears to have moved support for `-ms-viewport` behind a flag at some point, instead supporting meta viewport directives.
Removing this altogether also fixes issues in IE11 on high-dpi displays - see https://github.com/twbs/bootstrap/issues/21780

site/_data/browser-bugs.yml

@@ -48,16 +48,6 @@
   origin: >
     Bootstrap#18504
 
--
-  browser: >
-    Edge
-  summary: >
-    `@-ms-viewport{width: device-width;}` has side-effect of making scrollbars auto-hide
-  upstream_bug: >
-    Edge#7165383
-  origin: >
-    Bootstrap#18543
-
 -
   browser: >
     Edge