Removed redundant declarations for /upvoteCount /downvoteCount

Thanks @tmarshbing
For #2648 release finalization

Author: danbri

data/schema.ttl

@@ -5539,8 +5539,7 @@ Dateline summaries are oriented more towards human readers than towards automate
 
 :downvoteCount a rdf:Property ;
     rdfs:label "downvoteCount" ;
-    :domainIncludes :Comment,
-        :Question ;
+    :domainIncludes :Comment ;
     :rangeIncludes :Integer ;
     rdfs:comment "The number of downvotes this question, answer or comment has received from the community." .
 
@@ -9176,8 +9175,7 @@ we define a supporting type, [[SpeakableSpecification]]  which is defined to be
 
 :upvoteCount a rdf:Property ;
     rdfs:label "upvoteCount" ;
-    :domainIncludes :Comment,
-        :Question ;
+    :domainIncludes :Comment ;
     :rangeIncludes :Integer ;
     rdfs:comment "The number of upvotes this question, answer or comment has received from the community." .