Remove the unused md5Hex method

airsonic-main/src/main/java/org/airsonic/player/util/StringUtil.java

@@ -29,7 +29,6 @@ import java.net.URL;
 import java.net.URLDecoder;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
-import java.security.MessageDigest;
 import java.text.*;
 import java.util.*;
 import java.util.regex.Matcher;
@@ -331,25 +330,6 @@ public final class StringUtil {
         return new String(Hex.decodeHex(s.toCharArray()), StandardCharsets.UTF_8);
     }
 
-    /**
-     * Calculates the MD5 digest and returns the value as a 32 character hex string.
-     *
-     * @param s Data to digest.
-     * @return MD5 digest as a hex string.
-     */
-    public static String md5Hex(String s) {
-        if (s == null) {
-            return null;
-        }
-
-        try {
-            MessageDigest md5 = MessageDigest.getInstance("MD5");
-            return new String(Hex.encodeHex(md5.digest(s.getBytes(StandardCharsets.UTF_8))));
-        } catch (Exception x) {
-            throw new RuntimeException(x.getMessage(), x);
-        }
-    }
-
     /**
      * Returns the file part of an URL. For instance:
      * <p/>