Code comment change for delete() in EntityStorageBase

In the delete() method of the EntityStorageBase, there is a small error in a code comment.

    if (!$entities) {
      // If no IDs or invalid IDs were passed, do nothing.
      return;
    }

Actually, the IDs of the array passed don't really matter. The following should be more accurate:

    if (!$entities) {
      // If no entities were passed, do nothing.
      return;
    }