Simplify passing polls in shifts form component

app/components/admin/poll/shifts/form_component.html.erb

@@ -22,11 +22,11 @@
     <div class="small-12 medium-3 column">
       <label><%= t("admin.poll_shifts.new.date") %></label>
       <%= select "shift[date]", "vote_collection_date",
-                 options_for_select(shift_vote_collection_dates(voting_polls)),
+                 options_for_select(shift_vote_collection_dates),
                  { prompt: voting_polls.present? ? t("admin.poll_shifts.new.select_date") : t("admin.poll_shifts.new.no_voting_days") },
                  class: "js-shift-vote-collection-dates" %>
       <%= select "shift[date]", "recount_scrutiny_date",
-                 options_for_select(shift_recount_scrutiny_dates(recount_polls)),
+                 options_for_select(shift_recount_scrutiny_dates),
                  { prompt: t("admin.poll_shifts.new.select_date") },
                  class: "js-shift-recount-scrutiny-dates",
                  hidden: "hidden" %>

app/components/admin/poll/shifts/form_component.rb

@@ -17,16 +17,16 @@ class Admin::Poll::Shifts::FormComponent < ApplicationComponent
       booth.polls.current_or_recounting
     end
 
-    def shift_vote_collection_dates(polls)
+    def shift_vote_collection_dates
-      return [] if polls.blank?
+      return [] if voting_polls.blank?
 
-      date_options((start_date(polls)..end_date(polls)), Poll::Shift.tasks[:vote_collection])
+      date_options((voting_start_date..voting_end_date), Poll::Shift.tasks[:vote_collection])
     end
 
-    def shift_recount_scrutiny_dates(polls)
+    def shift_recount_scrutiny_dates
-      return [] if polls.blank?
+      return [] if recount_polls.blank?
 
-      dates = polls.map(&:ends_at).map(&:to_date).sort.reduce([]) do |total, date|
+      dates = recount_polls.map(&:ends_at).map(&:to_date).sort.reduce([]) do |total, date|
         initial_date = [date, Date.current].max
         total << (initial_date..date + Poll::RECOUNT_DURATION).to_a
       end
@@ -41,13 +41,13 @@ class Admin::Poll::Shifts::FormComponent < ApplicationComponent
       dates.reject { |date| officer_shifts(task_id).include?(date) }
     end
 
-    def start_date(polls)
+    def voting_start_date
-      start_date = polls.minimum(:starts_at).to_date
+      start_date = voting_polls.minimum(:starts_at).to_date
       [start_date, Date.current].max
     end
 
-    def end_date(polls)
+    def voting_end_date
-      polls.maximum(:ends_at).to_date
+      voting_polls.maximum(:ends_at).to_date
     end
 
     def officer_shifts(task_id)