removes poll_id from voter

YAGNI

app/models/poll/voter.rb

@@ -7,8 +7,6 @@ class Poll
     validate :in_census
     validate :has_not_voted
 
-    before_create :assign_poll
-
     def in_census
       errors.add(:document_number, :not_in_census) unless census_api_response.valid?
     end
@@ -29,9 +27,5 @@ class Poll
       @census.name
     end
 
-    def assign_poll
-      poll_id = booth_assignment.poll_id
-    end
-
   end
 end