Revert "test+productive code for case:1 of method prev in CDPlayer created."

This reverts commit b4583eece1.

src/main/java/device/cdPlayer/CDPlayer.java

@@ -52,8 +52,6 @@ public class CDPlayer implements Device {
 
     @Override
     public void prev() {
-        List<String> playList =  Arrays.asList(loadedCD.getPlayList());
-        this.actualPlayTrack=playList.get(playList.indexOf(actualPlayTrack) -1);
 
     }
 

src/test/java/device/cdPlayer/CDPlayerTest.java

@@ -197,29 +197,4 @@ class CDPlayerTest {
         );
     }
 
-    @ParameterizedTest
-    @MethodSource("prevTestData")
-    void prevTest(String testName,String testDirection, CDPlayer _cdPlayer,int anzClicks, String expectedResult){
-        for (int i = 0; i < anzClicks; i++) {
-            _cdPlayer.prev();
-        }
-        assertThat(_cdPlayer.getActualPlayTrack()).describedAs(testName).isEqualTo(expectedResult);
-    }
-    static Stream<Arguments> prevTestData () {
-
-        String[] audioPlayList=new String[]{"Audio 01","Audio 02","Audio 03","Audio 04","Audio 05"};
-        CD audioCD=new CD("Audio",audioPlayList);
-
-        CDPlayer cdPlayer1=new CDPlayer();
-        cdPlayer1.tapOnCdFlap();
-        cdPlayer1.setCD(audioCD);
-        cdPlayer1.tapOnCdFlap();
-        cdPlayer1.next();//1x nach Vorne
-
-       return Stream.of(
-               Arguments.of("[getActualPlayTrack() after 1x prev() starting by firstSong] => FirstSongSelected","FirstSongSelected", cdPlayer1, 1, cdPlayer1.getSongByNumber(0))
-               );
-
-    }
-
 }