Fix Travis lint offenses

Author: mecampbellsoup

lib/active_model_serializers/adapter/json_api/pagination_links.rb

@@ -57,7 +57,7 @@ def prev_page_url
         end
 
         def next_page_url
-          return nil if (collection.total_pages == 0 || collection.current_page == collection.total_pages)
+          return nil if collection.total_pages == 0 || collection.current_page == collection.total_pages
           url_for_page(collection.next_page)
         end
 

test/adapter/json_api/pagination_links_test.rb

@@ -60,7 +60,7 @@ def empty_collection_links
             first: "#{URI}?page%5Bnumber%5D=1&page%5Bsize%5D=2",
             prev: nil,
             next: nil,
-            last: "#{URI}?page%5Bnumber%5D=1&page%5Bsize%5D=2",
+            last: "#{URI}?page%5Bnumber%5D=1&page%5Bsize%5D=2"
           }
         end