remove stray old file

panel/src/panel/configuration/base.py

@@ -1,18 +0,0 @@
-from django.db import models
-import os
-import inspect
-
-class VersionedConfiguration(models.Model):
-    """Base class for all configuration versions"""
-
-    class Meta:
-        abstract = True  # don't create a table for this model
-
-
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-        # get version from file name and set it on the model instance
-        frame = inspect.stack()[1]
-        module = inspect.getmodule(frame[0])
-        module_file = os.path.basename(module.__file__)
-        self.version = int(module_file.replace('v', '').split('.')[0])