Remove redundant requestMappingHandlerMapping override

The bean no longer needs to be primary so the override is not needed
any more.

Closes gh-29682

Author: wilkinsona

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

@@ -66,7 +66,6 @@
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;
-import org.springframework.context.annotation.Primary;
 import org.springframework.core.Ordered;
 import org.springframework.core.annotation.Order;
 import org.springframework.core.io.Resource;
@@ -435,18 +434,6 @@ protected RequestMappingHandlerAdapter createRequestMappingHandlerAdapter() {
 			return super.createRequestMappingHandlerAdapter();
 		}
 
-		@Bean
-		@Primary
-		@Override
-		public RequestMappingHandlerMapping requestMappingHandlerMapping(
-				@Qualifier("mvcContentNegotiationManager") ContentNegotiationManager contentNegotiationManager,
-				@Qualifier("mvcConversionService") FormattingConversionService conversionService,
-				@Qualifier("mvcResourceUrlProvider") ResourceUrlProvider resourceUrlProvider) {
-			// Must be @Primary for MvcUriComponentsBuilder to work
-			return super.requestMappingHandlerMapping(contentNegotiationManager, conversionService,
-					resourceUrlProvider);
-		}
-
 		@Bean
 		public WelcomePageHandlerMapping welcomePageHandlerMapping(ApplicationContext applicationContext,
 				FormattingConversionService mvcConversionService, ResourceUrlProvider mvcResourceUrlProvider) {