Fix the Unit Test

Author: Thomas Lallement

tests/PhpSpreadsheetTests/Reader/Xlsx/DrawingInCell.php

@@ -14,10 +14,7 @@ public function testPictureInCell(): void
         $file = 'tests/data/Reader/XLSX/drawing_in_cell.xlsx';
         $reader = new Xlsx();
         $spreadsheet = $reader->load($file);
-
-        $reloadedSpreadsheet = $this->writeAndReload($spreadsheet, 'Xlsx');
-        $spreadsheet->disconnectWorksheets();
-        $sheet = $reloadedSpreadsheet->getActiveSheet();
+        $sheet = $spreadsheet->getActiveSheet();
         $drawings = $sheet->getDrawingCollection();
         self::assertCount(1, $drawings);
         if ($drawings[0] === null) {
@@ -33,6 +30,6 @@ public function testPictureInCell(): void
             self::assertSame(154, $drawings[0]->getImageHeight());
         }
 
-        $reloadedSpreadsheet->disconnectWorksheets();
+        $spreadsheet->disconnectWorksheets();
     }
 }