Remove redundant deprecation suppressions

Closes gh-27415

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/cache/CacheConfigurations.java

@@ -29,7 +29,6 @@ import org.springframework.util.Assert;
  * @author Eddú Meléndez
  * @author Sebastien Deleuze
  */
-@SuppressWarnings("deprecation")
 final class CacheConfigurations {
 
 	private static final Map<CacheType, String> MAPPINGS;

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/ResourceChainResourceHandlerRegistrationCustomizer.java

@@ -43,7 +43,6 @@ class ResourceChainResourceHandlerRegistrationCustomizer implements ResourceHand
 		configureResourceChain(properties, registration.resourceChain(properties.isCache()));
 	}
 
-	@SuppressWarnings("deprecation")
 	private void configureResourceChain(Resources.Chain properties, ResourceChainRegistration chain) {
 		Resources.Chain.Strategy strategy = properties.getStrategy();
 		if (properties.isCompressed()) {

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/WebFluxAutoConfiguration.java

@@ -113,7 +113,6 @@ public class WebFluxAutoConfiguration {
 	public static class WelcomePageConfiguration {
 
 		@Bean
-		@SuppressWarnings("deprecation")
 		public RouterFunctionMapping welcomePageRouterFunctionMapping(ApplicationContext applicationContext,
 				WebFluxProperties webFluxProperties, WebProperties webProperties) {
 			String[] staticLocations = webProperties.getResources().getStaticLocations();
@@ -131,7 +130,6 @@ public class WebFluxAutoConfiguration {
 
 	}
 
-	@SuppressWarnings("deprecation")
 	@Configuration(proxyBeanMethods = false)
 	@EnableConfigurationProperties({ WebProperties.class, WebFluxProperties.class })
 	@Import({ EnableWebFluxConfiguration.class })

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/error/ErrorWebFluxAutoConfiguration.java

@@ -48,7 +48,6 @@ import org.springframework.web.reactive.result.view.ViewResolver;
  * @author Scott Frederick
  * @since 2.0.0
  */
-@SuppressWarnings("deprecation")
 @Configuration(proxyBeanMethods = false)
 @ConditionalOnWebApplication(type = ConditionalOnWebApplication.Type.REACTIVE)
 @ConditionalOnClass(WebFluxConfigurer.class)

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/WebMvcProperties.java

@@ -208,7 +208,6 @@ public class WebMvcProperties {
 		return this.pathmatch;
 	}
 
-	@SuppressWarnings("deprecation")
 	public void checkConfiguration() {
 		if (this.getPathmatch().getMatchingStrategy() == MatchingStrategy.PATH_PATTERN_PARSER) {
 			if (this.getPathmatch().isUseSuffixPattern()) {

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/error/ErrorMvcAutoConfiguration.java

@@ -122,7 +122,6 @@ public class ErrorMvcAutoConfiguration {
 		return new PreserveErrorControllerTargetClassPostProcessor();
 	}
 
-	@SuppressWarnings("deprecation")
 	@Configuration(proxyBeanMethods = false)
 	@EnableConfigurationProperties({ WebProperties.class, WebMvcProperties.class })
 	static class DefaultErrorViewResolverConfiguration {