no-jira: removed ie fix for image width from bootstrap (bootstrap itself removes this in 3.3)

src/main/webapp/static/bootstrap/stylesheets/bootstrap/mixins/_image.scss

@@ -8,7 +8,6 @@
 // Keep images from scaling beyond the width of their parents.
 @mixin img-responsive($display: block) {
   display: $display;
-  width: 100% \9; // Force IE10 and below to size SVG images correctly
   max-width: 100%; // Part 1: Set a maximum relative to the parent
   height: auto; // Part 2: Scale the height according to the width, otherwise you get stretching
 }