Revert "[FIX] doc: odoo theme so it's compatible with Sphinx 1.2 / 1.3"

This reverts commit 8151a78aed.

This breaks accounting memento, will figure out later a proper fix

_extensions/odoo/__init__.py

@@ -2,15 +2,13 @@
 
 from . import pygments_override
 from . import switcher
+from . import translator
 
 import sphinx.environment
 import sphinx.builders.html
 from docutils import nodes
 def setup(app):
-    if getattr(app.config, 'html_translator_class', None):
-        app.warn("Overriding the explicitly set  html_translator_class setting",
-                 location="odoo extension")
-    app.config.html_translator_class = 'odoo.translator.BootstrapTranslator'
+    app.set_translator('html', translator.BootstrapTranslator)
 
     switcher.setup(app)
     app.add_config_value('odoo_cover_default', None, 'env')