remove the atomic model in pt_expt. mv atomic model's output stat tests to dpmodel's folder.

Author: Han Wang

deepmd/pt_expt/atomic_model/__init__.py

@@ -1,12 +1 @@
 # SPDX-License-Identifier: LGPL-3.0-or-later
-from .dp_atomic_model import (
-    DPAtomicModel,
-)
-from .energy_atomic_model import (
-    DPEnergyAtomicModel,
-)
-
-__all__ = [
-    "DPAtomicModel",
-    "DPEnergyAtomicModel",
-]

deepmd/pt_expt/atomic_model/dp_atomic_model.py

@@ -8,12 +8,12 @@
     make_fx,
 )
 
+from deepmd.dpmodel.atomic_model import (
+    DPEnergyAtomicModel,
+)
 from deepmd.dpmodel.model.dp_model import (
     DPModelCommon,
 )
-from deepmd.pt_expt.atomic_model import (
-    DPEnergyAtomicModel,
-)
 
 from .make_model import (
     make_model,