Revert "added commondatawriter.py & export method for CommonData pyth…

…on objects"

This reverts commit d2d2a5c.

validphys2/src/validphys/coredata.py

@@ -7,8 +7,6 @@
 import dataclasses
 from typing import Dict
 
-from validphys.commondatawriter import write_commondata_to_file, write_systype_to_file
-
 import numpy as np
 import pandas as pd
 
@@ -223,6 +221,7 @@ def with_cuts(self, cuts):
             self, ndata=newndata, commondata_table=new_commondata_table
         )
 
+
     @property
     def central_values(self):
         return self.commondata_table["data"]
@@ -303,18 +302,3 @@ def with_central_value(self, cv):
         tb = self.commondata_table.copy()
         tb["data"] = cv
         return dataclasses.replace(self, commondata_table=tb)
-
-    def export(self, path):
-        """Export the data, and error types
-         Use the same format as libNNPDF:
-
-        - A DATA_<dataset>.dat file with the dataframe of accepted points
-        - A systypes/STYPES_<dataset>.dat file with the error types
-        """
-
-        dat_path = path / f"DATA_{self.setname}.dat"
-        sys_path = path / "systypes" / f"SYSTYPE_{self.setname}_DEFAULT.dat"
-        sys_path.parent.mkdir(exist_ok=True)
-
-        write_systype_to_file(self, sys_path)
-        write_commondata_to_file(self, dat_path)