GH-2286: Doc Fixes

Resolves #2286

Remove `ackOnError` and fix error handler type.

Author: garyrussell

spring-kafka-docs/src/main/asciidoc/kafka.adoc

@@ -2474,10 +2474,6 @@ The `Collection` beans will be removed in a future release.
 |BATCH
 |Controls how often offsets are committed - see <<committing-offsets>>.
 
-|ackOnError
-|`false`
-|[DEPRECATED in favor of `ErrorHandler.isAckAfterHandle()`]
-
 |ackTime
 |5000
 |The time in milliseconds after which pending offsets are committed when the `ackMode` is `TIME` or `COUNT_TIME`.
@@ -5059,7 +5055,6 @@ For example, with the `@KafkaListener` container factory, you can add `SeekToCur
 public ConcurrentKafkaListenerContainerFactory<String, String> kafkaListenerContainerFactory() {
     ConcurrentKafkaListenerContainerFactory<String, String> factory = new ConcurrentKafkaListenerContainerFactory();
     factory.setConsumerFactory(consumerFactory());
-    factory.getContainerProperties().setAckOnError(false);
     factory.getContainerProperties().setAckMode(AckMode.RECORD);
     factory.setErrorHandler(new SeekToCurrentErrorHandler(new FixedBackOff(1000L, 2L)));
     return factory;