Polish test setup

This commit polishes a test configuration to avoid registering a mock
for the same bean twice.

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/DispatcherServletAutoConfigurationTests.java

@@ -83,7 +83,7 @@ class DispatcherServletAutoConfigurationTests {
 
 	@Test
 	void registrationOverrideWithAutowiredServlet() {
-		this.contextRunner.withUserConfiguration(CustomAutowiredRegistration.class, CustomDispatcherServletPath.class)
+		this.contextRunner.withUserConfiguration(CustomAutowiredRegistration.class)
 				.run((context) -> {
 					ServletRegistrationBean<?> registration = context.getBean(ServletRegistrationBean.class);
 					assertThat(registration.getUrlMappings()).containsExactly("/foo");