https://webkit.org/b/150715 has been fixed

Fixed by way of https://webkit.org/b/152803
Thanks Google Translate (I guess) and WebKit Team!
[ci skip]

docs/_data/browser-bugs.yml

@@ -300,16 +300,6 @@
   origin: >
     Bootstrap#16028
 
--
-  browser: >
-    Safari (iOS 9+)
-  summary: >
-    Sometimes excessive automatic zoom is applied after opening a modal, and the user isn't allowed to zoom out
-  upstream_bug: >
-    WebKit#150715
-  origin: >
-    WebKit#138201
-
 -
   browser: >
     Safari (iPad Pro)