Clean up for adding title to sticky header

- Update styles for fade out.
- Remove unused styles.

Bug: T289814
Change-Id: I0bdbaf1a1f0306d47df83f61811b0c85056415e0

resources/skins.vector.styles/components/StickyHeader.less

@@ -72,6 +72,7 @@
 	&-context-bar-primary {
 		position: relative;
 		max-width: 500px;
+		overflow: hidden;
 
 		// T289814 Fade out page titles longer than 500px.
 		/* Stylelint rule broken for vendor prefixes: https://github.com/stylelint/stylelint/issues/1939 */
@@ -87,13 +88,6 @@
 			background-image: linear-gradient( to right, rgba( 255, 255, 255, 0 ), rgba( 255, 255, 255, 1 ) 20px );
 		}
 	}
-
-	&-context-bar-secondary {
-		&:before {
-			padding-right: 15px;
-			content: '|';
-		}
-	}
 }
 
 .client-nojs .vector-sticky-header {