Bug 1263047 - Part 1: Remove extra '.iterations.infinite' CSS property. r=pbro

MozReview-Commit-ID: 31Rle6lkyn1

--HG--
extra : transplant_source : %8C%A3%89%F6%88%82%A0%05%B2%C1i%DE%00i%40%E9%0E%F9%919

devtools/client/themes/animationinspector.css

@@ -339,10 +339,6 @@ body {
   background-color: var(--timeline-background-color);
 }
 
-.animation-timeline .animation .iterations.infinite {
-  border-right-width: 0;
-}
-
 .animation-timeline .animation .iterations.infinite::before,
 .animation-timeline .animation .iterations.infinite::after {
   content: "";