Revert "Issue #3445785 by smulvih2: Normalizing file entity with missing file throws error"

This reverts commit 0090805f.

Closes #3445785

src/Normalizer/FileEntityNormalizer.php

@@ -22,22 +22,11 @@ class FileEntityNormalizer extends ContentEntityNormalizer {
   public function normalize($entity, $format = NULL, array $context = []): array|string|int|float|bool|\ArrayObject|NULL {
     $data = parent::normalize($entity, $format, $context);
     if (!isset($context['included_fields']) || in_array('data', $context['included_fields'])) {
-      $file_uri = $entity->getFileUri();
-
-      // Check if the file exists before attempting to read it.
-      if (file_exists($file_uri)) {
-        // Save base64-encoded file contents to the "data" property.
-        $file_data = base64_encode(file_get_contents($file_uri));
-          $data += array(
-          'data' => array(array('value' => $file_data)),
-        );
-      }
-      else {
-        // Save null to the "data" property.
-        $data += array(
-          'data' => array(array('value' => NULL)),
-        );
-      }
+      // Save base64-encoded file contents to the "data" property.
+      $file_data = base64_encode(file_get_contents($entity->getFileUri()));
+      $data += array(
+        'data' => array(array('value' => $file_data)),
+      );
     }
     return $data;
   }