Update samples to use configuration properties scanning

Closes gh-12602

spring-boot-samples/spring-boot-sample-simple/src/main/java/sample/simple/SampleConfigurationProperties.java

@@ -19,11 +19,9 @@ package sample.simple;
 import javax.validation.constraints.NotNull;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
-import org.springframework.stereotype.Component;
 import org.springframework.validation.annotation.Validated;
 
 @Validated
-@Component
 @ConfigurationProperties(prefix = "sample")
 public class SampleConfigurationProperties {