Clear custom ad domains list

Effectively removes 11 domains from the block list, since there was one
double-listed domain, 'syndication.realserv.com'.

lists/.gitignore

@@ -3,5 +3,5 @@
 # Except this file
 !.gitignore
 # ... And some others
+!/*.example
 !/AdroitAdorKhan-core.hosts
-!/custom-ad-domains.domains

lists/custom-ad-domains.domains

@@ -1,12 +0,0 @@
-1.nbryb.com
-100.nbryb.com
-50.nbryb.com
-anawkward.com
-cpa-optimizer.best
-mob-track.com
-notorietycheerypositively.com
-play.nbryb.com
-roastclap.com
-syndication.realsrv.com
-tripsbooth.com
-www.myemailtracking.com

lists/custom-ad-domains.domains.example

@@ -0,0 +1,8 @@
+# Add these custom domains for the blocklist.
+#
+# Must be in a file called *.domains in this directory.
+# Comments are allowed. One domain per line.
+#
+# Examples:
+# domain1.example.com
+# domain2.example.com