fix javadoc error

Author: tpietzsch

src/main/java/org/janelia/saalfeldlab/n5/readdata/ReadData.java

@@ -194,9 +194,6 @@ default ReadData encode(BytesCodec codec) throws IOException {
 	 * 		OutputStreamEncoder to use for encoding
 	 *
 	 * @return encoded ReadData
-	 *
-	 * @throws IOException
-	 * 		if any I/O error occurs
 	 */
 	default ReadData encode(OutputStreamEncoder encoder) {
 		return new EncodedReadData(this, encoder);