Fix model paths in prior fitted networks (#2843)

Summary:
Pull Request resolved: #2843

The model path for the main hebo model was misspecified in the prior fitted network code. I fixed that.

Additionally, I removed the path that accepts a user prior as input, as that is not supported by the botorch code yet.

Reviewed By: esantorella

Differential Revision: D73131935

fbshipit-source-id: 3934106765a54886e6b3eb1deb719061a8d5166c

Author: SamuelGabriel

botorch_community/models/utils/prior_fitted_network.py

@@ -28,16 +28,12 @@ class ModelPaths(Enum):
 
     pfns4bo_hebo = (
         "https://github.com/automl/PFNs4BO/raw/refs/heads/main/pfns4bo"
-        "/final_models/hebo_morebudget_9_unused_features_3_userpriorperdim2_8.pt.gz"
+        "/final_models/model_hebo_morebudget_9_unused_features_3.pt.gz"
     )
     pfns4bo_bnn = (
         "https://github.com/automl/PFNs4BO/raw/refs/heads/main/pfns4bo"
         "/final_models/model_sampled_warp_simple_mlp_for_hpob_46.pt.gz"
     )
-    pfns4bo_hebo_userprior = (
-        "https://github.com/automl/PFNs4BO/raw/refs/heads/main/pfns4bo"
-        "/final_models/hebo_morebudget_9_unused_features_3_userpriorperdim2_8.pt.gz"
-    )
 
 
 def download_model(