Changes getListFromCommaSeparatedStringList to reduce its responsibility

src/main/java/net/knarcraft/ffmpegconverter/utility/ListUtil.java

@@ -65,18 +65,15 @@ public final class ListUtil {
     /**
      * Gets a list from a comma separated string at index in list
      *
-     * @param list  <p>A list of tokens.</p>
-     * @param index <p>The index of the token containing comma separated entries.</p>
+     * @param string <p>A string which may include commas.</p>
      * @return <p>A string list.</p>
      */
-    public static String[] getListFromCommaSeparatedStringList(List<String> list, int index) {
-        String[] result = null;
-        if (list.size() > index) {
-            if (list.get(index).contains(",")) {
-                result = list.get(index).split(",");
-            } else {
-                result = new String[]{list.get(index)};
-            }
+    public static String[] getListFromCommaSeparatedString(String string) {
+        String[] result;
+        if (string.contains(",")) {
+            result = string.split(",");
+        } else {
+            result = new String[]{string};
         }
         return result;
     }