Suppr warnings

src/main/java/TP2/Main.java

@@ -1,7 +1,5 @@
 package TP2;
 
-import java.nio.file.Paths;
-import java.util.Optional;
 import java.io.IOException;
 
 import org.antlr.runtime.ANTLRFileStream;
@@ -36,7 +34,7 @@ public class Main {
       Program ast = parser.program();
 
       // Pretty-print the program (to debug parsing)
-      System.err.println("todo");
+      System.err.println("todo" + ast);
 
       // Verify the program semantic