Remove TODOs, and set favicon.

react-slideshow/src/App.tsx

@@ -67,7 +67,6 @@ type AlbumProps = {
 };
 type AlbumState = {
   error: any;
-  // TODO(wathiede): define a MediaItem type.
   mediaItems: Array<MediaItem> | null;
   idx: number;
   showUI: boolean;
@@ -111,7 +110,6 @@ class Album extends React.Component<AlbumProps, AlbumState> {
   render() {
     // TODO(wathiede): fade transition.
     // TODO(wathiede): pair-up portrait orientation images.
-    // TODO(wathiede): fetch an image that maintains the originals aspect ratio
     let w = window.innerWidth * window.devicePixelRatio;
     let h = window.innerHeight * window.devicePixelRatio;
     let ratio = w/h;
@@ -194,7 +192,6 @@ class Album extends React.Component<AlbumProps, AlbumState> {
       };
       let ui;
       if (showUI) {
-        // TODO(wathiede): set image as background of the div in the style.
         ui = <div id="ui">
           <div
           style={leftPrefetchStyle}