sinon-chai is no longer a depedency

package.json

@@ -52,7 +52,6 @@
     "yuidocjs": "~0.3.36",
     "chai": "~1.7.2",
     "mocha": "~1.12.0",
-    "sinon-chai": "~2.4.0",
     "chai-datetime": "~1.0.0"
   },
   "keywords": [

test/dao.test.js

 /* jshint camelcase: false */
 var chai      = require('chai')
-  , sinonChai = require('sinon-chai')
   , expect    = chai.expect
   , Support   = require(__dirname + '/support')
   , DataTypes = require(__dirname + "/../lib/data-types")
@@ -10,7 +9,6 @@ var chai      = require('chai')
   , datetime  = require('chai-datetime')
   , _         = require('lodash')
 
-chai.use(sinonChai)
 chai.use(datetime)
 chai.Assertion.includeStack = true