gh-40309: Fix lint
    
Fix lint failure introduced in
#39920 . Strangely, https://github.
com/sagemath/sage/actions/runs/15639025083/job/44061585299 had no
failure.

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URL: #40309
Reported by: user202729
Reviewer(s): Frédéric Chapoton

Author: Release Manager

src/sage/rings/number_field/number_field.py

@@ -4236,7 +4236,6 @@ def _pari_absolute_structure(self):
         beta = alpha.modreverse()
         return f, alpha, beta
 
-
     def pari_polynomial(self, name='x'):
         """
         Return the PARI polynomial corresponding to this number field.