Remove unused imports in FileUtils

Author: sdeleuze

common/utils/src/main/java/org/graalvm/buildtools/utils/FileUtils.java

@@ -52,10 +52,8 @@
 import java.nio.file.StandardCopyOption;
 import java.security.MessageDigest;
 import java.security.NoSuchAlgorithmException;
-import java.util.Arrays;
 import java.util.Optional;
 import java.util.function.Consumer;
-import java.util.stream.Stream;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;