Querying the drag offer with every pointer movement would require refactoring to work with the portal implementation, however, there is little point, as the event layer just discards the file name. Remove the existing code and note that a new implementation is needed if the name ever starts to be passed though.
In the event that this is reimplemented, it should cache the filenames, as otherwise, this could potentially hammer the DBus interface hundreds or even thousands of times per second.
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