Delete due date specs on issues list

Delete these specs because the issues list does not officially
support sorting by due_date on the UI, and there are already
specs for this.

spec/features/issues/user_sorts_issues_spec.rb

@@ -119,89 +119,6 @@ RSpec.describe "User sorts issues" do
     end
   end
 
-  describe 'filtering by due date', :js do
-    before do
-      issue1.update!(due_date: 1.day.from_now)
-      issue2.update!(due_date: 6.days.from_now)
-    end
-
-    it 'filters by none' do
-      visit project_issues_path(project, due_date: Issue::NoDueDate.name)
-
-      page.within '.issues-list' do
-        expect(page).not_to have_content('foo')
-        expect(page).not_to have_content('bar')
-        expect(page).to have_content('baz')
-      end
-    end
-
-    it 'filters by any' do
-      visit project_issues_path(project, due_date: Issue::AnyDueDate.name)
-
-      page.within '.issues-list' do
-        expect(page).to have_content('foo')
-        expect(page).to have_content('bar')
-        expect(page).not_to have_content('baz')
-      end
-    end
-
-    it 'filters by due this week' do
-      issue1.update!(due_date: Date.today.beginning_of_week + 2.days)
-      issue2.update!(due_date: Date.today.end_of_week)
-      issue3.update!(due_date: Date.today - 8.days)
-
-      visit project_issues_path(project, due_date: Issue::DueThisWeek.name)
-
-      page.within '.issues-list' do
-        expect(page).to have_content('foo')
-        expect(page).to have_content('bar')
-        expect(page).not_to have_content('baz')
-      end
-    end
-
-    it 'filters by due this month' do
-      issue1.update!(due_date: Date.today.beginning_of_month + 2.days)
-      issue2.update!(due_date: Date.today.end_of_month)
-      issue3.update!(due_date: Date.today - 50.days)
-
-      visit project_issues_path(project, due_date: Issue::DueThisMonth.name)
-
-      page.within '.issues-list' do
-        expect(page).to have_content('foo')
-        expect(page).to have_content('bar')
-        expect(page).not_to have_content('baz')
-      end
-    end
-
-    it 'filters by overdue' do
-      issue1.update!(due_date: Date.today + 2.days)
-      issue2.update!(due_date: Date.today + 20.days)
-      issue3.update!(due_date: Date.yesterday)
-
-      visit project_issues_path(project, due_date: Issue::Overdue.name)
-
-      page.within '.issues-list' do
-        expect(page).not_to have_content('foo')
-        expect(page).not_to have_content('bar')
-        expect(page).to have_content('baz')
-      end
-    end
-
-    it 'filters by due next month and previous two weeks' do
-      issue1.update!(due_date: Date.today - 4.weeks)
-      issue2.update!(due_date: (Date.today + 2.months).beginning_of_month)
-      issue3.update!(due_date: Date.yesterday)
-
-      visit project_issues_path(project, due_date: Issue::DueNextMonthAndPreviousTwoWeeks.name)
-
-      page.within '.issues-list' do
-        expect(page).not_to have_content('foo')
-        expect(page).not_to have_content('bar')
-        expect(page).to have_content('baz')
-      end
-    end
-  end
-
   describe 'sorting by milestone', :js do
     before do
       issue1.milestone = newer_due_milestone