Move poll shifts form partial to a component

Thanks to it, we can move a few helper methods to the component.

app/helpers/shifts_helper.rb

@@ -1,40 +0,0 @@
-module ShiftsHelper
-  def shift_vote_collection_dates(booth, polls)
-    return [] if polls.blank?
-
-    date_options((start_date(polls)..end_date(polls)), Poll::Shift.tasks[:vote_collection], booth)
-  end
-
-  def shift_recount_scrutiny_dates(booth, polls)
-    return [] if polls.blank?
-
-    dates = 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
-    date_options(dates.flatten.uniq, Poll::Shift.tasks[:recount_scrutiny], booth)
-  end
-
-  def date_options(dates, task_id, booth)
-    valid_dates(dates, task_id, booth).map { |date| [l(date, format: :long), l(date)] }
-  end
-
-  def valid_dates(dates, task_id, booth)
-    dates.reject { |date| officer_shifts(task_id, booth).include?(date) }
-  end
-
-  def start_date(polls)
-    start_date = polls.minimum(:starts_at).to_date
-    [start_date, Date.current].max
-  end
-
-  def end_date(polls)
-    polls.maximum(:ends_at).to_date
-  end
-
-  private
-
-    def officer_shifts(task_id, booth)
-      @officer.shifts.where(task: task_id, booth: booth).map(&:date)
-    end
-end