Remove product filter helper spec as it's not needed anymore

spec/helpers/spree/admin/product_filter_helper_spec.rb

@@ -1,18 +0,0 @@
-# frozen_string_literal: true
-
-require 'spec_helper'
-
-describe Spree::Admin::ProductFilterHelper, type: :helper do
-  describe 'product_filters' do
-    it 'should return only parameters included in PRODUCT_FILTER' do
-      parameters = { 'query' => 'test', 'categoryFilter' => 2, 'randomFilter' => 5 }
-
-      filters = helper.product_filters(parameters)
-
-      puts filters.inspect
-      expect(filters.key?('query')).to be true
-      expect(filters.key?('categoryFilter')).to be true
-      expect(filters.key?('randomFilter')).to be false
-    end
-  end
-end