Removed unused methods

``contentFilters`` and ``sortfilter`` are get inside the ``ListLinkHandler`` and not the ``ListLinkHandlerFactory``
 ``ListLinkHandlerFactory`` only passes these values through when ``fromQuery`` is called

extractor/src/main/java/org/schabi/newpipe/extractor/linkhandler/ListLinkHandler.java

@@ -1,5 +1,7 @@
 package org.schabi.newpipe.extractor.linkhandler;
 
+import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+
 import java.util.Collections;
 import java.util.List;
 
@@ -25,14 +27,12 @@ public class ListLinkHandler extends LinkHandler {
                 handler.sortFilter);
     }
 
-    public ListLinkHandler(final LinkHandler handler,
+    public ListLinkHandler(final LinkHandler handler) {
-                           final List<String> contentFilters,
-                           final String sortFilter) {
         this(handler.originalUrl,
                 handler.url,
                 handler.id,
-                contentFilters,
+                Collections.emptyList(),
-                sortFilter);
+                EMPTY_STRING);
     }
 
     public List<String> getContentFilters() {

extractor/src/main/java/org/schabi/newpipe/extractor/linkhandler/ListLinkHandlerFactory.java

@@ -13,16 +13,6 @@ public abstract class ListLinkHandlerFactory extends LinkHandlerFactory {
     // To Override
     ///////////////////////////////////
 
-    @SuppressWarnings({"RedundantThrows", "unused"})
-    public List<String> getContentFilter(final String url) throws ParsingException {
-        return Collections.emptyList();
-    }
-
-    @SuppressWarnings({"RedundantThrows", "unused"})
-    public String getSortFilter(final String url) throws ParsingException {
-        return "";
-    }
-
     public abstract String getUrl(String id, List<String> contentFilter, String sortFilter)
             throws ParsingException;
 
@@ -50,18 +40,17 @@ public abstract class ListLinkHandlerFactory extends LinkHandlerFactory {
             throw new IllegalArgumentException("url may not be null");
         }
 
-        return new ListLinkHandler(super.fromUrl(url, baseUrl), getContentFilter(url),
+        return new ListLinkHandler(super.fromUrl(url, baseUrl));
-                getSortFilter(url));
     }
 
     @Override
     public ListLinkHandler fromId(final String id) throws ParsingException {
-        return new ListLinkHandler(super.fromId(id), new ArrayList<>(0), "");
+        return new ListLinkHandler(super.fromId(id));
     }
 
     @Override
     public ListLinkHandler fromId(final String id, final String baseUrl) throws ParsingException {
-        return new ListLinkHandler(super.fromId(id, baseUrl), new ArrayList<>(0), "");
+        return new ListLinkHandler(super.fromId(id, baseUrl));
     }
 
     public ListLinkHandler fromQuery(final String id,

extractor/src/main/java/org/schabi/newpipe/extractor/linkhandler/SearchQueryHandlerFactory.java

@@ -3,6 +3,7 @@ package org.schabi.newpipe.extractor.linkhandler;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 
 import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
@@ -39,7 +40,7 @@ public abstract class SearchQueryHandlerFactory extends ListLinkHandlerFactory {
     }
 
     public SearchQueryHandler fromQuery(final String query) throws ParsingException {
-        return fromQuery(query, new ArrayList<>(0), EMPTY_STRING);
+        return fromQuery(query, Collections.emptyList(), EMPTY_STRING);
     }
 
     /**

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubePlaylistLinkHandlerFactory.java

@@ -97,9 +97,7 @@ public final class YoutubePlaylistLinkHandlerFactory extends ListLinkHandlerFact
                 }
                 final String newUrl = "https://www.youtube.com/watch?v=" + videoID
                     + "&list=" + listID;
-                return new ListLinkHandler(new LinkHandler(url, newUrl, listID),
+                return new ListLinkHandler(new LinkHandler(url, newUrl, listID));
-                        getContentFilter(url),
-                        getSortFilter(url));
             }
         } catch (final MalformedURLException exception) {
             throw new ParsingException("Error could not parse URL: " + exception.getMessage(),