从Visio中删除数据源

嘿伙计们，

我正在用数据源试验和测试Visio。现在我似乎无法删除Visio中的现有数据源。在这个窗口中，我看到了我的数据源（灭火器，Sharepoint Online中的一个表） - 但我找不到任何可以删除
与该数据源的链接的地方。 

I was experimenting and testing Visio with datasources. Now i cannot seem to delete an existing datasource within Visio. In this window i see my datasource (fire extinguishers, a table in Sharepoint Online) - but i cannot find anywhere where i can delete the link with that datasource. 

我问这个，因为每次我启动Visio 2016时它都会显示外部数据窗口。如果我隐藏它，保存图表重新打开，外部数据窗口重新出现。 

I ask this, because everytime i start Visio 2016 it shows the window External Data. If i hide it, save the diagram en reopen, the External Data window reappears. 

有任何建议吗？