Remove snippet breadcrumb spec

We removed the breadcrumbs in 0def3677.

spec/features/snippets/user_sees_breadcrumb_links_spec.rb

-# frozen_string_literal: true
-
-require 'rails_helper'
-
-describe 'New user snippet breadcrumbs' do
-  let(:user) { create(:user) }
-
-  before do
-    sign_in(user)
-    visit new_snippet_path
-  end
-
-  it 'display a link to user snippets and new user snippet pages' do
-    page.within '.breadcrumbs' do
-      expect(find_link('Snippets')[:href]).to end_with(dashboard_snippets_path)
-      expect(find_link('New')[:href]).to end_with(new_snippet_path)
-    end
-  end
-end