Fix incorrect @Nullable on ItemReadListener#afterRead implementations

Resolves BATCH-2763

Author: fmbenhassine

spring-batch-core/src/main/java/org/springframework/batch/core/jsr/ItemReadListenerAdapter.java

@@ -19,7 +19,6 @@
 
 import org.springframework.batch.core.ItemReadListener;
 import org.springframework.batch.item.ItemReader;
-import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 
 /**
@@ -51,7 +50,7 @@ public void beforeRead() {
 	}
 
 	@Override
-	public void afterRead(@Nullable T item) {
+	public void afterRead(T item) {
 		try {
 			delegate.afterRead(item);
 		} catch (Exception e) {

spring-batch-core/src/main/java/org/springframework/batch/core/listener/MulticasterBatchListener.java

@@ -223,7 +223,7 @@ public void beforeChunk(ChunkContext context) {
 	 * @see org.springframework.batch.core.listener.CompositeItemReadListener#afterRead(java.lang.Object)
 	 */
 	@Override
-	public void afterRead(@Nullable T item) {
+	public void afterRead(T item) {
 		try {
 			itemReadListener.afterRead(item);
 		}

spring-batch-core/src/main/java/org/springframework/batch/core/listener/StepListenerSupport.java

@@ -72,7 +72,7 @@ public void beforeChunk(ChunkContext context) {
 	 * @see org.springframework.batch.core.domain.ItemReadListener#afterRead(java.lang.Object)
 	 */
 	@Override
-	public void afterRead(@Nullable T item) {
+	public void afterRead(T item) {
 	}
 
 	/* (non-Javadoc)