Remove title line

Because we want to be able to easily read the edgelist with several
graph programs and they would not all accept the same
header. `read_edgelist` from Networkx accepts a comment line starting
with a special character. Not very elegant to put column headers after
a #. Anyway, the headers predecessor and successor are obvious for an
edge list.

Convert_Matlab/overlap_v6.py

@@ -22,7 +22,6 @@ print("e_overestim =", e_overestim)
 
 with open(f"edgelist_{orientation}.csv", "w", newline = '') as edgelist:
     writer = csv.writer(edgelist, delimiter = ' ', lineterminator = "\n")
-    writer.writerow(["predecessor", "successor"])
 
     for k1 in range(n_dates):
         for i1, id_child_1 in enumerate(id_child[:n_eddies[k1], k1]):