http://wkbug.com/144990 no longer repros; rm it from Wall of Browser Bugs

Refs twbs#15998
Effectively reverts twbs#16473
[skip sauce]

Author: cvrebert

docs/_data/browser-bugs.yml

@@ -230,16 +230,6 @@
   origin: >
     Bootstrap#16180
 
--
-  browser: >
-    Safari (OS X)
-  summary: >
-    Unnecessary line-wrapping of `.navbar-brand` text for no apparent reason
-  upstream_bug: >
-    WebKit#144990, Safari#20950962
-  origin: >
-    Bootstrap#15998
-
 -
   browser: >
     Safari (iOS)