Fix RuboCop empty line issues in delete and sharing specs

Author: johha

spec/request/service_instances_delete_spec.rb

@@ -784,5 +784,4 @@
       end
     end
   end
-
 end

spec/request/service_instances_sharing_spec.rb

@@ -700,5 +700,4 @@ def create_bindings(instance, space:, count:)
       it_behaves_like 'permissions for single object endpoint', ALL_PERMISSIONS + ADDITIONAL_PERMISSIONS_TO_TEST
     end
   end
-
 end