Revert "listen to history for active state changes, store active state in component state"

This reverts commit 57206a6.

Conflicts:
	modules/Link.js
	modules/__tests__/Link-test.js

Author: ryanflorence

modules/Link.js

@@ -54,46 +54,6 @@ var Link = React.createClass({
     };
   },
 
-  getInitialState() {
-    var active = this.getActiveState();
-    return { active };
-  },
-
-  trySubscribe() {
-    var { history } = this.context;
-    if (!history) return;
-    this._unlisten = history.listen(this.handleHistoryChange);
-  },
-
-  tryUnsubscribe() {
-    if (!this._unlisten) return;
-    this._unlisten();
-    this._unlisten = undefined;
-  },
-
-  handleHistoryChange() {
-    var { active } = this.state;
-    var nextActive = this.getActiveState();
-    if (active !== nextActive) {
-      this.setState({ active: nextActive });
-    }
-  },
-
-  getActiveState() {
-    var { history } = this.context;
-    var { to, query, onlyActiveOnIndex } = this.props;
-    if (!history) return false;
-    return history.isActive(to, query, onlyActiveOnIndex);
-  },
-
-  componentDidMount() {
-    this.trySubscribe();
-  },
-
-  componentWillUnmount() {
-    this.tryUnsubscribe();
-  },
-
   handleClick(event) {
     var allowTransition = true;
     var clickResult;
@@ -131,14 +91,13 @@ var Link = React.createClass({
     };
 
     var { history } = this.context;
-    var { active } = this.state;
 
     // Ignore if rendered outside the context
     // of history, simplifies unit testing.
     if (history) {
       props.href = history.createHref(to, query);
 
-      if (active) {
+      if (history.isActive(to, query, onlyActiveOnIndex)) {
         if (props.activeClassName)
           props.className += props.className !== '' ? ` ${props.activeClassName}` : props.activeClassName;