sign_in: remove hack for displaying the procedure context

Before there was no way to display the informations about a procedure
without having a dossier. Thus an empty dossier was created.

Now we can display the informations of a procedure using a @procedure
instance variable, so we can move this hack away.

spec/views/layouts/procedure_context.html.haml_spec.rb

@@ -8,6 +8,24 @@ describe 'layouts/procedure_context.html.haml', type: :view do
     render html: 'Column content', layout: 'layouts/procedure_context.html.haml'
   end
 
+  context 'when a procedure is assigned' do
+    before do
+      assign(:procedure, procedure)
+    end
+
+    it 'renders a description of the procedure' do
+      expect(subject).to have_text(procedure.libelle)
+      expect(subject).to have_text(procedure.description)
+    end
+
+    it 'renders the inner content' do
+      expect(subject).to have_text('Column content')
+    end
+
+    it 'renders the procedure footer' do
+      expect(subject).to have_text(procedure.service.nom)
+      expect(subject).to have_text(procedure.service.email)
+    end
   end
 
   context 'when a dossier is assigned' do
@@ -30,5 +48,17 @@ describe 'layouts/procedure_context.html.haml', type: :view do
     end
   end
 
+  context 'when neither procedure or dossier are assigned' do
+    it 'renders a placeholder for the procedure' do
+      expect(subject).to have_selector('.no-procedure')
+    end
+
+    it 'renders the inner content' do
+      expect(subject).to have_text('Column content')
+    end
+
+    it 'renders a generic footer' do
+      expect(subject).to have_text('Mentions légales')
+    end
   end
 end