Remove unused methods

mq/main/mqcomm-util/src/main/java/com/sun/messaging/jmq/util/CharacterDecoder.java

@@ -155,13 +155,4 @@ public byte decodeBuffer(String inputString)[] throws IOException {
         decodeBuffer(inStream, outStream);
         return (outStream.toByteArray());
     }
-
-    /**
-     * Decode the contents of the inputstream into a buffer.
-     */
-    public byte decodeBuffer(InputStream in)[] throws IOException {
-        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
-        decodeBuffer(in, outStream);
-        return (outStream.toByteArray());
-    }
 }

mq/main/mqcomm-util/src/main/java/com/sun/messaging/jmq/util/CharacterEncoder.java

@@ -205,20 +205,4 @@ public void encodeBuffer(byte aBuffer[], OutputStream aStream) throws IOExceptio
         encodeBuffer(inStream, aStream);
     }
 
-    /**
-     * A 'streamless' version of encode that simply takes a buffer of bytes and returns a string containing the encoded
-     * buffer.
-     */
-    public String encodeBuffer(byte aBuffer[]) {
-        ByteArrayOutputStream outStream = new ByteArrayOutputStream();
-        ByteArrayInputStream inStream = new ByteArrayInputStream(aBuffer);
-        try {
-            encodeBuffer(inStream, outStream);
-        } catch (Exception IOException) {
-            // This should never happen.
-            return null;
-        }
-        return (outStream.toString());
-    }
-
 }

mq/main/mqcomm-util/src/test/java/com/sun/messaging/jmq/util/BASE64EncoderTest.java

@@ -18,16 +18,21 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+
 import org.junit.jupiter.api.Test;
 
 class BASE64EncoderTest {
     private BASE64Encoder encoder = new BASE64Encoder();
 
     @Test
-    void testEncodingDate() {
+    void testEncodingDate() throws IOException {
         var plain = "Thu 16 Dec 20:37:57 UTC 2021";
+        var buffer = new ByteArrayOutputStream();
 
-        var encoded = encoder.encodeBuffer(plain.getBytes());
+        encoder.encodeBuffer(plain.getBytes(), buffer);
+        var encoded = buffer.toString();
 
         assertThat(encoded).isEqualTo("VGh1IDE2IERlYyAyMDozNzo1NyBVVEMgMjAyMQ==" + System.lineSeparator());
     }