diff --git a/sklearn/mixture/_gaussian_mixture.py b/sklearn/mixture/_gaussian_mixture.py
index c4bdd3a0d68c8..83417a468ec47 100644
--- a/sklearn/mixture/_gaussian_mixture.py
+++ b/sklearn/mixture/_gaussian_mixture.py
@@ -863,9 +863,6 @@ def _set_parameters(self, params):
         ) = params
 
         # Attributes computation
-        _, n_features = self.means_.shape
-
-        dtype = self.precisions_cholesky_.dtype
         if self.covariance_type == "full":
             self.precisions_ = np.empty_like(self.precisions_cholesky_)
             for k, prec_chol in enumerate(self.precisions_cholesky_):