update screenshots from v4

Author: Lambada10

README.md

@@ -6,13 +6,12 @@ A simple Android app to download lyrics (.lrc files) for songs in your music lib
 * Download lyrics for individual songs in your music library
 * Search for lyrics for songs not in your music library (and download them)
 
-### Screenshots (v2.0.0)
+### Screenshots (v4.0.0)
 ![Screenshot 1](https://github.com/Lambada10/SongSync/raw/master/screenshots/screenshot1.png)
 ![Screenshot 2](https://github.com/Lambada10/SongSync/raw/master/screenshots/screenshot2.png)
 ![Screenshot 3](https://github.com/Lambada10/SongSync/raw/master/screenshots/screenshot3.png)
 ![Screenshot 4](https://github.com/Lambada10/SongSync/raw/master/screenshots/screenshot4.png)
 ![Screenshot 5](https://github.com/Lambada10/SongSync/raw/master/screenshots/screenshot5.png)
-![Screenshot 6](https://github.com/Lambada10/SongSync/raw/master/screenshots/screenshot6.png)
 
 ### Installation
 <a href="https://apt.izzysoft.de/fdroid/index/apk/pl.lambada.songsync/"><img src="https://gitlab.com/IzzyOnDroid/repo/-/raw/master/assets/IzzyOnDroid.png" alt="Get it on IzzyOnDroid" height="100"></a>
@@ -22,14 +21,6 @@ You can download the latest version of the app from the [releases page](https://
 ### Translation
 If you would like to help translating this app, you can do so [here](https://translate.nift4.org/engage/songsync/).
 
-### Building
-To build this app, it is recommended to create a file called `local.properties` in the root directory of the project. This file should contain the following lines:
-```properties
-spotify_client_id=<your spotify client id>
-spotify_client_secret=<your spotify client secret>
-```
-You can get these values by creating a new app on the [Spotify Developer Dashboard](https://developer.spotify.com/dashboard/applications).
-
 ### License
 This project is licensed under the GNU General Public License v3.0 - see the [LICENSE](https://github.com/Lambada10/SongSync/blob/master/LICENSE) file for details.