remove old data modifier module

Author: ChiahsinChu

deepmd/tf/__init__.py

@@ -21,7 +21,7 @@
     DeepEval,
     DeepPotential,
 )
-from .infer.data_modifier import (
+from .modifier import (
     DipoleChargeModifier,
 )
 

deepmd/tf/infer/__init__.py

@@ -8,9 +8,6 @@
     DeepEval,
 )
 
-from .data_modifier import (
-    DipoleChargeModifier,
-)
 from .deep_dipole import (
     DeepDipole,
 )
@@ -43,7 +40,6 @@
     "DeepPot",
     "DeepPotential",
     "DeepWFC",
-    "DipoleChargeModifier",
     "EwaldRecp",
     "calc_model_devi",
 ]