Revert "Fix import error in pyhton 2.6."

This reverts commit f6a78cb4b2.

secretary.py

@@ -22,15 +22,10 @@ import re
 import sys
 import logging
 import zipfile
+from collections import OrderedDict
 from xml.dom.minidom import parseString
 from jinja2 import Environment, Undefined
 
-try:
-    from collections import OrderedDict
-except ImportError:
-    # Its python 2.6
-    pass
-
 # Test python versions and normalize calls to basestring, unicode, etc.
 try:
     unicode = unicode
@@ -308,7 +303,7 @@ class Renderer(object):
     def _encode_escape_chars(self, xml_text):
         if sys.version_info >= (2, 7):
             encode_rules = OrderedDict()
-
+            
         encode_rules = {
             '(?i)(<text:(?:[ahp]|ruby-base|span|meta|meta-field)>.*)(\n)(.*</text:(?:[ahp]|ruby-base|span|meta|meta-field)>)': r'\1<text:line-break/>\3',
             '(?i)(<text:(?:[ahp]|ruby-base|span|meta|meta-field)>.*)(\u0009)(.*</text:(?:[ahp]|ruby-base|span|meta|meta-field)>)': r'\1<text:tab>\3',