Revert "Issue #2548725 by dawehner: Fix database exception handling, causing test fails in PostgreSQL"

This reverts commit 4b7ba21316.

core/lib/Drupal/Core/Database/Driver/pgsql/Connection.php

@@ -118,16 +118,7 @@ class Connection extends DatabaseConnection {
       // Convert numeric values to strings when fetching.
       \PDO::ATTR_STRINGIFY_FETCHES => TRUE,
     );
-
-    try {
     $pdo = new \PDO($dsn, $connection_options['username'], $connection_options['password'], $connection_options['pdo']);
-    }
-    catch (\Exception $e) {
-      if ($e->getCode() == static::DATABASE_NOT_FOUND) {
-        throw new DatabaseNotFoundException($e->getMessage(), $e->getCode(), $e);
-      }
-      throw new $e;
-    }
 
     return $pdo;
   }