Address IDE warnings

src/main/java/org/ahocorasick/trie/Trie.java

@@ -53,7 +53,7 @@ public class Trie {
         return asEmits(parsedText);
     }
 
-    @SuppressWarnings("unchecked")
+    @SuppressWarnings("UnusedReturnValue")
     public Collection<Emit> parseText( final CharSequence text, final StatefulEmitHandler emitHandler) {
         Collection<PayloadEmit<String>> parsedText = this.payloadTrie.parseText(text,
                 new StatefulPayloadEmitDelegateHandler(emitHandler));
@@ -90,10 +90,6 @@ public class Trie {
 
     public static class TrieBuilder {
 
-        private final TrieConfig trieConfig = new TrieConfig();
-
-        private final PayloadTrie<String> trie = new PayloadTrie<>(trieConfig);
-
         private final PayloadTrieBuilder<String> delegate = PayloadTrie.builder();
 
         /**
@@ -157,6 +153,7 @@ public class Trie {
          * @param keywords The keywords to add to the list.
          * @return This builder.
          */
+        @SuppressWarnings("unused")
         public TrieBuilder addKeywords( final Collection<String> keywords ) {
             for (String keyword : keywords) {
                 this.delegate.addKeyword(keyword, null);