code: def drop_index(self, model, *columns):
          
          columns_ = []
          for col in columns:
              field = model._meta.fields.get(col)
              if not field:
                  continue
  
              if len(columns) == 1:
                  field.unique = field.index = False
  
              if isinstance(field, pw.ForeignKeyField):
                  col = col + '_id'
              columns_.append(col)
          index_name = make_index_name(model._meta.table_name, columns_)
          model._meta.indexes = [(cols, _) for (cols, _) in model._meta.indexes if columns != cols]
          self.ops.append(self.migrator.drop_index(model._meta.table_name, index_name))
          return model
docs: Drop indexes.