Removed invalid 'application/vnd.ms-excel [official]' mime type from xls
diff --git a/application/config/mimes.php b/application/config/mimes.php
index 6cc1ae9..1917b11 100644
--- a/application/config/mimes.php
+++ b/application/config/mimes.php
@@ -56,7 +56,7 @@
'smi' => 'application/smil',
'smil' => 'application/smil',
'mif' => 'application/vnd.mif',
- 'xls' => array('application/vnd.ms-excel', 'application/vnd.ms-excel [official]', 'application/msexcel', 'application/x-msexcel', 'application/x-ms-excel', 'application/x-excel', 'application/x-dos_ms_excel', 'application/xls', 'application/x-xls', 'application/excel', 'application/download', 'application/vnd.ms-office', 'application/msword'),
+ 'xls' => array('application/vnd.ms-excel', 'application/msexcel', 'application/x-msexcel', 'application/x-ms-excel', 'application/x-excel', 'application/x-dos_ms_excel', 'application/xls', 'application/x-xls', 'application/excel', 'application/download', 'application/vnd.ms-office', 'application/msword'),
'ppt' => array('application/powerpoint', 'application/vnd.ms-powerpoint'),
'pptx' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation',
'wbxml' => 'application/wbxml',