Refactoring - DRYing up code. Use existing .backends method.

app/models/import_job.rb

@@ -109,15 +109,7 @@ class ImportJob < ApplicationModel
   #
   # return [nil]
   def self.queue_registered
-    import_backends = Setting.get('import_backends')
-    return if import_backends.blank?
-
-    import_backends.each do |backend|
-
-      if !backend_valid?(backend)
-        Rails.logger.error "Invalid import backend '#{backend}'"
-        next
-      end
+    backends.each do |backend|
 
       # skip backends that are not "ready" yet
       next if !backend.constantize.queueable?

spec/models/import_job_spec.rb

@@ -120,7 +120,7 @@ RSpec.describe ImportJob do
     it 'logs errors for invalid registered backends' do
       allow(Setting).to receive(:get)
       expect(Setting).to receive(:get).with('import_backends').and_return(['InvalidBackend'])
-      expect(Rails.logger).to receive(:error)
+      expect(described_class.logger).to receive(:error)
       described_class.queue_registered
     end