tests: Remove old noseOfYeti and sure requirements from tox.ini

Author: cwacek

tox.ini

@@ -8,10 +8,6 @@ commands = coverage run {envbindir}/py.test {posargs}
            coverage html --omit=*test* --include=*python_jsonschema_objects*
 deps =
   -rrequirements.txt
-  nose
   coverage
-  rednose
-  https://github.com/cwacek/sure/tarball/master
-  https://github.com/delfick/nose-of-yeti/tarball/master
   pytest