Index: lams_admin/web/import/importexcel.jsp
===================================================================
diff -u -re88830091139dd447cdd6a7f30c129c777104dac -rbc66c534c18e8e49ce8ed510418400cbc56fd605
--- lams_admin/web/import/importexcel.jsp	(.../importexcel.jsp)	(revision e88830091139dd447cdd6a7f30c129c777104dac)
+++ lams_admin/web/import/importexcel.jsp	(.../importexcel.jsp)	(revision bc66c534c18e8e49ce8ed510418400cbc56fd605)
@@ -68,17 +68,7 @@
 							  // its format is: upload_<userId>_<timestamp>
 							  'tmpFileUploadId' : tmpFileUploadId,
 							  'largeFilesAllowed' : true
-						  },
-						  onBeforeFileAdded: function(currentFile, files) {
-							  var name = currentFile.data.name,
-							  	  extensionIndex = name.lastIndexOf('.'),
-							  	  valid = allowedFileTypes.includes(name.substring(extensionIndex).trim());
-							  if (!valid) {
-								  uppy.info('<fmt:message key="error.attachment.not.xls" />', 'error', 10000);
-							  }
-							  
-							  return valid;
-					    }
+						  }
 					  };
 				  
 				  switch(language) {