Fix Antora Warnings in servlet/authentication/adaptive.adoc

Issue gh-2603

Author: rwinch

docs/src/test/kotlin/org/springframework/security/kt/docs/servlet/authentication/authorizationmanagerfactory/ListAuthoritiesEverywhereConfiguration.kt

@@ -34,8 +34,6 @@ class ListAuthoritiesEverywhereConfiguration {
     }
     // end::httpSecurity[]
 
-
-    // end::httpSecurity[]
     @Bean
     fun userDetailsService(): UserDetailsService {
         return InMemoryUserDetailsManager(

docs/src/test/kotlin/org/springframework/security/kt/docs/servlet/authentication/multifactorauthentication/ListAuthoritiesConfiguration.kt

@@ -33,8 +33,6 @@ internal class ListAuthoritiesConfiguration {
     }
     // end::httpSecurity[]
 
-
-    // end::httpSecurity[]
     @Bean
     fun userDetailsService(): UserDetailsService {
         return InMemoryUserDetailsManager(

docs/src/test/kotlin/org/springframework/security/kt/docs/servlet/authentication/obtainingmoreauthorization/MissingAuthorityConfiguration.kt

@@ -122,7 +122,6 @@ internal class MissingAuthorityConfiguration {
     }
     // end::authorizationManagerFactory[]
 
-    // end::authenticationEntryPoint[]
     @Bean
     fun clients(): ClientRegistrationRepository {
         return InMemoryClientRegistrationRepository(TestClientRegistrations.clientRegistration().build())

docs/src/test/kotlin/org/springframework/security/kt/docs/servlet/authentication/obtainingmoreauthorization/ScopeConfiguration.kt

@@ -30,7 +30,6 @@ class ScopeConfiguration {
     }
     // end::httpSecurity[]
 
-    // end::httpSecurity[]
     @Bean
     fun clients(): ClientRegistrationRepository {
         return InMemoryClientRegistrationRepository(TestClientRegistrations.clientRegistration().build())

docs/src/test/kotlin/org/springframework/security/kt/docs/servlet/authentication/reauthentication/RequireOttConfiguration.kt

@@ -34,7 +34,6 @@ class RequireOttConfiguration {
     }
     // end::httpSecurity[]
 
-    // end::httpSecurity[]
     @Bean
     fun userDetailsService(): UserDetailsService {
         return InMemoryUserDetailsManager(

docs/src/test/kotlin/org/springframework/security/kt/docs/servlet/authentication/reauthentication/SimpleConfiguration.kt

@@ -31,7 +31,6 @@ class SimpleConfiguration {
     }
     // end::httpSecurity[]
 
-    // end::httpSecurity[]
     @Bean
     fun userDetailsService(): UserDetailsService {
         return InMemoryUserDetailsManager(