Remove refreshing indicator from ActivitiesView

I've decided I'm going to add an indicator for when the client is
disconnected so the indicator would be pretty redundant (and it
requires a bunch of code to implement).

client/styles.css

@@ -27,20 +27,3 @@
 	margin-top: -2px;
 	margin-left: 3px;
 }
-
-/*
- * Couldn't find a built-in way to get the common OSD overlay style of
- * rounding the bottom corners but not the top ones, so doing this
- * myself with this CSS rule.
- */
-overlay > frame.osd {
-	border-radius: 0 0 8px 8px;
-}
-
-.popdown {
-	transition: transform 200ms ease-in-out;
-	transform: translateY(-100px);
-}
-.popdown.visible {
-	transform: translateY(0);
-}