Remove unnecessary return statements

Author: fmbenhassine

spring-batch-core/src/main/java/org/springframework/batch/core/launch/support/JobRegistryBackgroundJobRunner.java

@@ -164,7 +164,6 @@ private void maybeCreateJobLoader() {
 		}
 
 		jobLoader = parentContext.getBean(names[0], JobLoader.class);
-		return;
 
 	}
 

spring-batch-core/src/test/java/org/springframework/batch/core/launch/TaskExecutorJobLauncherTests.java

@@ -106,7 +106,6 @@ public boolean isRestartable() {
 			@Override
 			public void execute(JobExecution execution) {
 				execution.setExitStatus(ExitStatus.COMPLETED);
-				return;
 			}
 		};
 
@@ -133,7 +132,6 @@ public boolean isRestartable() {
 			@Override
 			public void execute(JobExecution execution) {
 				execution.setExitStatus(ExitStatus.COMPLETED);
-				return;
 			}
 		};
 

spring-batch-infrastructure/src/test/java/org/springframework/batch/item/validator/SpringValidatorTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2022 the original author or authors.
+ * Copyright 2006-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -121,7 +121,6 @@ public void validate(Object value, Errors errors) {
 			if (value.equals(REJECT_MULTI_VALUE)) {
 				errors.rejectValue("foo", "bad.value");
 				errors.rejectValue("bar", "bad.value");
-				return;
 			}
 		}
 

spring-batch-integration/src/test/java/org/springframework/batch/integration/item/MessagingGatewayIntegrationTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2006-2022 the original author or authors.
+ * Copyright 2006-2023 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -136,7 +136,6 @@ static class EndService {
 		@ServiceActivator
 		public void service(String input) {
 			count++;
-			return;
 		}
 
 	}