Minus superfluous sentence.

includes/mimetype.utils.inc

@@ -23,8 +23,7 @@ function islandora_get_extension_for_mimetype($mimetype) {
   $extension_index = array_search($mimetype, $mimetype_mapping['mimetypes']);
   if ($extension_index !== FALSE) {
     // Reversing such that any altered values take precedence over the default
-    // mappings. As such we need to handle the case of application/xml mapping
-    // to .xml.
+    // mappings.
     $mime_array_flipped = array_reverse($mimetype_mapping['extensions']);
     $extension = array_search($extension_index, $mime_array_flipped);
   }