似乎在HTTP标头If-Match中传递了etag，在行删除的情况下没有做任何事情。这就是我试过的：
curl --silent -X GET --header "GData-Version: 3.0" --header "Authorization: GoogleLogin auth=$TOKEN" https://spreadsheets.google.com/feeds/list/xxx/od6/private/full/cokwr | tidy -xml -indent -quiet | egrep "etag|title"
gd:etag='"YGdaHlAXHyt7Ig.."'>
<title>TEST1</title>
Changed the cell. (The etag changed)
curl --silent -X GET --header "GData-Version: 3.0" --header "Authorization: GoogleLogin auth=$TOKEN" https://spreadsheets.google.com/feeds/list/xxx/od6/private/full/cokwr | tidy -xml -indent -quiet | egrep "etag|title"
gd:etag='"agoUURMYXyt7ImA."'>
<title>TEST1-new</title>
curl --silent -X DELETE --header 'If-Match: "YGdaHlAXHyt7Ig.."' --header "GData-Version: 3.0" --header "Authorization: GoogleLogin auth=$TOKEN" https://spreadsheets.google.com/feeds/list/xxx/od6/private/full/cokwr | tidy -xml -indent -quiet
(The row got deleted)
https://developers.google.com/google-apps/spreadsheets/?csw=1#deleting_a_list_row