Remove 'next' event

After all the other changes, it turns out to be redundant.

Author: grncdr

lib/results.js

@@ -66,7 +66,6 @@ Results.prototype._watch = function (t) {
     });
 
     t.on('test', function (st) { self._watch(st) });
-    t.on('next', function (st) { st.run() });
 };
 
 Results.prototype.close = function () {

lib/test.js

@@ -97,7 +97,7 @@ Test.prototype.end = function () {
         t.on('end', function () {
             self.end();
         });
-        this.emit('next', t);
+        t.run();
         return;
     }