Remove dependency on improperly used and unmaintained contract module

- contract module has not see a release since 2010
- Corresponding PEP has been deferred
- python-contract module in Debian is orphaned
- We are only using contract module in one method of one module
- That can be replaced with one line of check instead of depending on an
  entire module
- The code using contract module does not work
- There is already replacement one line code that is actually working

Makefile

@@ -17,7 +17,7 @@ default: config dirs template css docs
 all: default
 
 predepend:
-	sudo sh -c "apt-get install augeas-tools libpython2.7 pandoc psmisc python2.7 python-augeas python-passlib python-bcrypt python-bjsonrpc python-cheetah python-cherrypy3 python-simplejson python-contract sudo"
+	sudo sh -c "apt-get install augeas-tools libpython2.7 pandoc psmisc python2.7 python-augeas python-passlib python-bcrypt python-bjsonrpc python-cheetah python-cherrypy3 python-simplejson sudo"
 	git submodule init
 	git submodule update
 	touch predepend

actions.py

@@ -72,11 +72,9 @@ Actions run commands with this contract (version 1.1):
 
 """
 
-import contract
 import os
 import pipes, shlex, subprocess
 
-contract.checkmod(__name__)
 
 def run(action, options = None, async = False):
     """Safely run a specific action as the current user.
@@ -104,12 +102,6 @@ def _run(action, options = None, async = False, run_as_root = False):
     async: run asynchronously or wait for the command to complete.
 
     run_as_root: execute the command through sudo.
-
-    pre:
-        os.sep not in action
-    inv:
-        True # Actions directory hasn't changed.  It's hardcoded :)
-
     """
     DIRECTORY = "actions"