There are these unnecessary lines in my geojson:
You see, not all the borderline was deleted when I merged two countries.
Is there any way to quickly select and remove the features in a practical manner, because there's more than one case like this I'm dealing with.
Thanks in advance.
EDIT: Deleted some of them by using Edit>"Remove Ring".
But there are still some which cannot be removed by this tool. Is there such plugin available, that will remove lines that are irrelevant with the polygon?