Remove unused go_back_to_new calls and unused error_create key

- Remove two redundant go_back_to_new calls in build_results, since
  @poll.questions.find already raises RecordNotFound if a question
  does not exist.
- Drop the fallback flash translation error_create, which is no longer
  used since commit 592fdffe4e and only remained as a default in
  go_back_to_new.
- Move check_officer_assignment from Officing::BaseController to
  Officing::ResultsController, its only place of use.

app/controllers/officing/base_controller.rb

@@ -13,12 +13,6 @@ class Officing::BaseController < ApplicationController
       raise CanCan::AccessDenied unless current_user&.poll_officer?
     end
 
-    def check_officer_assignment
-      if @officer_assignment.blank?
-        go_back_to_new(t("officing.results.flash.error_wrong_booth"))
-      end
-    end
-
     def load_officer_assignment
       @officer_assignments ||= current_user.poll_officer.officer_assignments.where(date: Time.current.to_date)
     end

app/controllers/officing/results_controller.rb

@@ -38,13 +38,11 @@ class Officing::ResultsController < Officing::BaseController
 
       params[:questions].each_pair do |question_id, results|
         question = @poll.questions.find(question_id)
-        go_back_to_new if question.blank?
 
         results.each_pair do |answer_index, count|
           next if count.blank?
 
           answer = question.question_options.find_by(given_order: answer_index.to_i + 1).title
-          go_back_to_new if question.blank?
 
           partial_result = ::Poll::PartialResult.find_or_initialize_by(
             booth_assignment_id: @officer_assignment.booth_assignment_id,
@@ -79,10 +77,10 @@ class Officing::ResultsController < Officing::BaseController
       @results << recount
     end
 
-    def go_back_to_new(alert = nil)
+    def go_back_to_new(alert)
       params[:d] = Date.current
       params[:oa] = results_params[:officer_assignment_id]
-      flash.now[:alert] = (alert || t("officing.results.flash.error_create"))
+      flash.now[:alert] = alert
       load_officer_assignments
       load_partial_results
       render :new
@@ -123,4 +121,10 @@ class Officing::ResultsController < Officing::BaseController
     def index_params
       params.permit(:booth_assignment_id, :date)
     end
+
+    def check_officer_assignment
+      if @officer_assignment.blank?
+        go_back_to_new(t("officing.results.flash.error_wrong_booth"))
+      end
+    end
 end