Remove outdated/dead domains

Source/domainset/cdn.conf

@@ -3430,7 +3430,6 @@ img.foresightnews.pro
 cdn.sunofbeaches.com
 image.theblockbeats.info
 .jbkcdn.io
-.akamai-content-network.com
 cdn.windowsreport.com
 video.cdnbye.com
 signal.cdnbye.com
@@ -4522,7 +4521,6 @@ s3.anilist.co
 s4.anilist.co
 .dellcdn.com
 ui.powerreviews.com
-cdn.linux.do
 .ldstatic.com
 ih0.redbubble.net
 ih1.redbubble.net