Link to perfcompare instead of comparechooser in perfherder's header

Author: beatrice-acasandrei

ui/perfherder/App.jsx

@@ -13,7 +13,6 @@ import GraphsView from './graphs/GraphsView';
 import AlertsView from './alerts/AlertsView';
 import TestsView from './tests/TestsView';
 import CompareView from './compare/CompareView';
-import CompareSelectorView from './compare/CompareSelectorView';
 import CompareSubtestsView from './compare/CompareSubtestsView';
 import CompareSubtestDistributionView from './compare/CompareSubtestDistributionView';
 import Navigation from './Navigation';
@@ -111,17 +110,6 @@ class App extends React.Component {
                     />
                   )}
                 />
-                <Route
-                  path={`${path}/comparechooser`}
-                  render={(props) => (
-                    <CompareSelectorView
-                      {...props}
-                      user={user}
-                      projects={projects}
-                      frameworks={frameworks}
-                    />
-                  )}
-                />
                 <Route
                   path={`${path}/compare`}
                   render={(props) => (

ui/perfherder/Navigation.jsx

@@ -17,9 +17,14 @@ const Navigation = ({ user, setUser, notify }) => (
         </Link>
       </NavItem>
       <NavItem>
-        <Link to="./comparechooser" className="nav-link btn-view-nav">
+        <a
+          href="https://perf.compare"
+          target="_blank"
+          rel="noopener noreferrer"
+          className="nav-link btn-view-nav"
+        >
           Compare
-        </Link>
+        </a>
       </NavItem>
       <NavItem>
         <Link