Remove TYPO3_DB dependency

Classes/Domain/Repository/MemberRepository.php

@@ -34,17 +34,11 @@ class MemberRepository extends \TYPO3\CMS\Extbase\Persistence\Repository
         'lastname' => QueryInterface::ORDER_ASCENDING
     ];
 
-    /**
-     * @param string $filterString
-     * @param integer $filterMembership
-     * @return QueryResultInterface
-     */
-    public function findByStringAndMembership($filterString, $filterMembership)
+    public function findByStringAndMembership(string $filterString, int $filterMembership): QueryResultInterface
     {
         $query = $this->createQuery();
         $constraints = [];
         if ($filterString) {
-            $filterString = $this->getDatabaseConnection()->escapeStrForLike($filterString, 'tx_t3omembership_domain_model_member');
             $constraints = $query->logicalOr(
                 [
                     $query->like('name', '%' . $filterString . '%'),
@@ -59,12 +53,4 @@ class MemberRepository extends \TYPO3\CMS\Extbase\Persistence\Repository
 
         return $query->matching($query->logicalAnd($constraints))->execute();
     }
-
-    /**
-     * @return \TYPO3\CMS\Core\Database\DatabaseConnection
-     */
-    protected function getDatabaseConnection()
-    {
-        return $GLOBALS['TYPO3_DB'];
-    }
 }