ISLANDORA-1998 Check correct permission for replace ds link. (#681)

* ISLANDORA-1998 Check correct permission for replace ds link.

* Remove redundant theme check.

theme/theme.inc

@@ -64,18 +64,12 @@ function template_preprocess_islandora_default_edit(array &$variables) {
     elseif (user_access(ISLANDORA_VIEW_DATASTREAM_HISTORY)) {
       $row[] = array();
     }
-    if (islandora_datastream_access(ISLANDORA_VIEW_DATASTREAM_HISTORY, $ds)) {
+    $row[] = array(
-      // Add new datastream content as the lastest version.
+      'class' => 'datastream-replace',
-      $row[] = array(
+      'data' => theme('islandora_datastream_replace_link', array(
-        'class' => 'datastream-replace',
+        'datastream' => $ds,
-        'data' => theme('islandora_datastream_replace_link', array(
+      )),
-          'datastream' => $ds,
+    );
-        )),
-      );
-    }
-    else {
-      $row[] = array();
-    }
     $row[] = array(
       'class' => 'datastream-download',
       'data' => theme('islandora_datastream_download_link', array(