Clean up stuff from mix pl

Coming from unclean merge and missing hints from IDE

Author: XiangRongLin

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeParsingHelper.java

@@ -65,12 +65,6 @@ public class YoutubeParsingHelper {
     private YoutubeParsingHelper() {
     }
 
-    /**
-     * The official youtube app supports intents in this format, where after the ':' is the videoId.
-     * Accordingly there are other apps sharing streams in this format.
-     */
-    public final static String BASE_YOUTUBE_INTENT_URL = "vnd.youtube";
-
     private static final String HARDCODED_CLIENT_VERSION = "2.20200214.04.00";
     private static String clientVersion;
 

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/YoutubeMixPlaylistExtractorTest.java

@@ -41,10 +41,10 @@ public class YoutubeMixPlaylistExtractorTest {
     private static final String VIDEO_ID = "_AzeUSL9lZc";
     private static final String VIDEO_TITLE =
             "Most Beautiful And Emotional  Piano: Anime Music Shigatsu wa Kimi no Uso OST IMO";
+    private static final Map<String, String> dummyCookie
+            = Collections.singletonMap(YoutubeMixPlaylistExtractor.COOKIE_NAME, "whatever");
 
     private static YoutubeMixPlaylistExtractor extractor;
-    private static Map<String, String> dummyCookie
-            = Collections.singletonMap(YoutubeMixPlaylistExtractor.COOKIE_NAME, "whatever");
 
     public static class Mix {