Remove bogus Javadoc tags.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1748130 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/main/java/org/apache/commons/codec/digest/HmacUtils.java

@@ -900,7 +900,6 @@ private HmacUtils(final Mac mac) {
      *
      * @param algorithm to be used
      * @param  key the key to be used
-     * @return the instance
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught or key is null or key is invalid.
      * @since 1.11
@@ -914,7 +913,6 @@ public HmacUtils(final String algorithm, final byte[] key) {
      *
      * @param algorithm to be used
      * @param  key the key to be used
-     * @return the instance
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught or key is null or key is invalid.
      * @since 1.11
@@ -928,7 +926,6 @@ public HmacUtils(final String algorithm, final String key) {
      *
      * @param algorithm to be used
      * @param  key the key to be used
-     * @return the instance
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught or key is null or key is invalid.
      * @since 1.11
@@ -941,7 +938,6 @@ public HmacUtils(final HmacAlgorithms algorithm, final String key) {
      * Creates an instance using the provided algorithm type.
      *
      * @param algorithm to be used.
-     * @return the instance
      * @throws IllegalArgumentException
      *             when a {@link NoSuchAlgorithmException} is caught or key is null or key is invalid.
      * @since 1.11