Update ad-banners.css

Removed TwitchCon banner

Author: Ephellon

ttv-tools/ad-banners.css

@@ -6,3 +6,4 @@ button[class*="interact"i] [style*="asset"i] < button < 3
 [class*="gift"i][class*="expir"i][class*="call"i] < 3
 [href*="recap"i] < footer
 img[src*="bonus-round"i] < [class*="bonus-round"i]
+a[href*="tickets"i] < footer