Remove -webkit-clip-path

https://caniuse.com/?search=clip-path says that `clip-path`
is supported since Safari 13.1

internal/ui/static/css/common.css

@@ -53,7 +53,6 @@ a:hover {
 .sr-only {
     border: 0 !important;
     clip: rect(1px, 1px, 1px, 1px) !important;
-    -webkit-clip-path: inset(50%) !important;
     clip-path: inset(50%) !important;
     height: 1px !important;
     overflow: hidden !important;