Remove untested condition

Author: eps1lon

src/Transition.js

@@ -326,7 +326,7 @@ class Transition extends React.Component {
     this.setNextCallback(handler)
 
     const doesNotHaveTimeoutOrListener = timeout == null && !this.props.addEndListener
-    if (!node || doesNotHaveTimeoutOrListener) {
+    if (doesNotHaveTimeoutOrListener) {
       setTimeout(this.nextCallback, 0)
       return
     }