Remove @SuppressWarnings("unused") for generated Lexer classes

Unlike in the parser, there should be no unused things anywhere here.

src/main/java/org/sablecc/sablecc/lexer/Lexer.java

@@ -10,7 +10,6 @@ import java.io.PushbackReader;
 
 import org.sablecc.sablecc.node.*;
 
-@SuppressWarnings("unused")
 public class Lexer
 {
     protected Token token;

src/main/resources/org/sablecc/sablecc/lexer.txt

@@ -34,7 +34,6 @@ import java.io.PushbackReader;
 
 import $0$node.*;
 
-@SuppressWarnings("unused")
 public class Lexer
 {
     protected Token token;