remove and clean code

converters/template.py

@@ -18,17 +18,11 b' a conversion of IPython notebooks to some other format should inherit.'
 from __future__ import print_function, absolute_import
 
 # Stdlib imports
-import jinja2
-import codecs
 import io
-import logging
 import os
 from IPython.utils import path
-import pprint
-import re
-from types import FunctionType
 
-from jinja2 import Environment, PackageLoader, FileSystemLoader
+from jinja2 import Environment, FileSystemLoader
 env = Environment(
         loader=FileSystemLoader('./templates/'), 
         extensions=['jinja2.ext.loopcontrols']
@@ -36,9 +30,8 b' env = Environment('
 
 # IPython imports
 from IPython.nbformat import current as nbformat
-from IPython.config.configurable import Configurable, SingletonConfigurable
-from IPython.utils.traitlets import (List, Unicode, Type, Bool, Dict, CaselessStrEnum,
-                                    Any)
+from IPython.config.configurable import Configurable
+from IPython.utils.traitlets import ( Unicode, Any)
 
 # Our own imports
 from IPython.utils.text import indent
@@ -125,12 +118,8 b' class ConverterTemplate(Configurable):'
 
     def __init__(self, tplfile='fullhtml', config=None, **kw):
         self.template = env.get_template(tplfile+'.tpl')
-        super(ConverterTemplate,self).__init__(config=config)
-
-    def _get_prompt_number(self, cell):
-        return cell.prompt_number if hasattr(cell, 'prompt_number') \
-            else self.blank_symbol
-
+        self.nb = None
+        super(ConverterTemplate, self).__init__(config=config, **kw)
 
     def process(self):
         converted_cells = []
@@ -146,7 +135,7 b' class ConverterTemplate(Configurable):'
 
         return converted_cells
 
-    def convert(self, cell_separator='\n'):
+    def convert(self):
         """ convert the ipynb file
 
         return both the converted ipynb file and a dict containing potential