Certainly looks like the graft took just fine. Looks like Parafilm to me. I wouldn't touch it. Parafilm will break down on it's own and poses no risk of girdling a tree.

Looks like Parafilm to me, as well, and agree, I wouldn't bother it; though mine would not be that pristine 8 weeks out - I'd expect cracking/splitting at the edges of the graft well before now if that's all I'd used... but maybe the Parafilm 'grafting tape' formulation is 'tougher' than the Parafilm M that I use (but it's harder to work with).

Thumbs up! Yeah I stretched my parafilm and it's already breaking down and cracking a bit after only 3 weeks. Should fall off eventually from everything I'm hearing.