Remove http://bugzil.la/975632 from Wall of Browser Bugs

http://bugzil.la/975632 has been fixed by http://bugzil.la/823483 which should land in Firefox 46.
Refs #10690
[ci skip]

docs/_data/browser-bugs.yml

@@ -68,16 +68,6 @@
   origin: >
     Bootstrap#13453
 
--
-  browser: >
-    Firefox
-  summary: >
-    `max-width: 100%;` doesn't work inside tables.
-  upstream_bug: >
-    Mozilla#975632
-  origin: >
-    Bootstrap#10690
-
 -
   browser: >
     Firefox