Small codestyle changes for Geo backfill feature

app/controllers/admin/geo_nodes_controller.rb

 class Admin::GeoNodesController < Admin::ApplicationController
   before_action :check_license
-  before_action :load_node, except: [:index, :create]
+  before_action :load_node, only: [:destroy, :repair, :backfill_repositories]
 
   def index
     @nodes = GeoNode.all

app/workers/geo_repository_backfill_worker.rb

@@ -7,8 +7,6 @@ class GeoRepositoryBackfillWorker
     project = Project.find(project_id)
     geo_node = GeoNode.find(geo_node_id)
 
-    return unless project && geo_node
-
     Geo::RepositoryBackfillService.new(project, geo_node).execute
   end
 end