Bug 1366043 - Docs: Remove misleading version of 'prototype'

Since otherwise the page titles contain the word 'prototype':
`- Treeherder prototype documentation`

docs/conf.py

@@ -55,15 +55,6 @@
 project = u'Treeherder'
 copyright = u'Mozilla and other contributors'
 
-# The version info for the project you're documenting, acts as replacement for
-# |version| and |release|, also used in various other places throughout the
-# built documents.
-#
-# The short X.Y version.
-version = 'prototype'
-# The full version, including alpha/beta/rc tags.
-release = 'prototype'
-
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
 # language = None