Remove unused exceptions.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1744620 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

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

@@ -1035,7 +1035,7 @@ public String asHex() {
      * @return the updated {@link DigestUtils}
      * @since 1.11
      */
-    public DigestUtils update(final byte[] data) throws IOException {
+    public DigestUtils update(final byte[] data) {
         messageDigest.update(data);
         return this;
     }
@@ -1048,7 +1048,7 @@ public DigestUtils update(final byte[] data) throws IOException {
      * @return the updated {@link DigestUtils}
      * @since 1.11
      */
-    public DigestUtils update(final ByteBuffer data) throws IOException {
+    public DigestUtils update(final ByteBuffer data) {
         messageDigest.update(data);
         return this;
     }
@@ -1061,7 +1061,7 @@ public DigestUtils update(final ByteBuffer data) throws IOException {
      * @return the updated {@link DigestUtils}
      * @since 1.11
      */
-    public DigestUtils update(final String data) throws IOException {
+    public DigestUtils update(final String data) {
         messageDigest.update(StringUtils.getBytesUtf8(data));
         return this;
     }