Removing duplicate entries

[NeilOrley]

Removing duplicates for 'Nano Labs Ltd Class A Ordinary Shares' and 'Nano Labs Ltd American Depositary Shares'. They are already listed at lines 100728 and 100562

[JerBouma]

The ticker of this instrument is NAN which coincidentally is also nan in Python which means every time it checks whether this ticker exists or not it determines it doesn't. I need to fix this in the pipeline but thank you for taking these out manually.