diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index d27a3ce091..84ca7a1d9f 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -2357,7 +2357,6 @@ function system_update_8703(&$sandbox = NULL) {
     // This must be the first run for this entity type. Initialize the
     // sub-sandbox for it.
     if (!isset($sandbox[$entity_type_id])) {
-      $sandbox[$entity_type_id]['progress'] = 0;
       $sandbox[$entity_type_id]['current_id'] = -1;
     }
 
@@ -2394,20 +2393,10 @@ function system_update_8703(&$sandbox = NULL) {
           ->execute();
       }
 
-      $sandbox[$entity_type_id]['progress']++;
       $sandbox[$entity_type_id]['current_id'] = $revision_id;
     }
 
-    $missing = $database->select($revision_table, 't')
-      ->condition("t.$revision_id_column", $sandbox[$entity_type_id]['current_id'], '>')
-      ->isNull("t.$revision_parent_column")
-      ->orderBy($revision_id_column, 'ASC')
-      ->countQuery()
-      ->execute()
-      ->fetchField();
-    $sandbox[$entity_type_id]['finished'] = $missing ? $sandbox[$entity_type_id]['progress'] / ($sandbox[$entity_type_id]['progress'] + (int) $missing) : 1;
-
-    if ($sandbox[$entity_type_id]['finished']) {
+    if (count($revisions) < $step_size) {
       $sandbox['current']++;
     }
   }