Bug 925176 - Remove exceptions for .OM gTLD. r=gerv

There is no more wildcard rule. Exceptions are not required.

netwerk/dns/effective_tld_names.dat

@@ -5050,16 +5050,6 @@ museum.om
 net.om
 org.om
 pro.om
-!mediaphone.om
-!nawrastelecom.om
-!nawras.om
-!omanmobile.om
-!omanpost.om
-!omantel.om
-!rakpetroleum.om
-!siemens.om
-!songfest.om
-!statecouncil.om
 
 // org : http://en.wikipedia.org/wiki/.org
 org