delete one more field from file format

0062-save_graph_to_disk

@@ -9,6 +9,7 @@ save_graph_to_disk = function()
 			table.insert(v.data, l.data)
 		end
 		v.editor = nil
+		v.show_cursor = nil
 		table.insert(kvs, {k, v})
 	end
 	-- sort the copy to avoid spurious diffs in version control
@@ -24,4 +25,4 @@ save_graph_to_disk = function()
 	end
 	f:write('}}\n')
 	f:close()
-end
+end