MINOR: [Dev] Remove maplefu as collaborator (apache#38397)

### Rationale for this change

@ mapleFU is committer now 🎉 

### What changes are included in this PR?

Remove from list of collaborators.

### Are these changes tested?

No

### Are there any user-facing changes?

No

Authored-by: Raúl Cumplido <[email protected]>
Signed-off-by: mwish <[email protected]>

Author: raulcd

.asf.yaml

@@ -25,7 +25,6 @@ github:
     - davisusanibar
     - felipecrv
     - js8544
-    - mapleFU
 
 notifications:
   commits:      [email protected]