[export] fix acp ReferrerScopeAggregator query + unit test

TO CHECK: logic in alterQuery. calc_date is same for 2 histories ?

src/Bundle/ChillPersonBundle/Tests/Export/Aggregator/AccompanyingCourseAggregators/ReferrerScopeAggregatorTest.php

@@ -71,7 +71,6 @@ final class ReferrerScopeAggregatorTest extends AbstractAggregatorTest
             $em->createQueryBuilder()
                 ->select('count(acp.id)')
                 ->from(AccompanyingPeriod::class, 'acp')
-                ->join('acp.scopes', 'acpscope'),
         ];
     }
 }