Desabilitar Form Login

Caros, por favor, sabem como posso desabilitar o form login,

mesmo removendo a linha "and().formLogin()" continuo recebendo o formulário quando acessos o /auth.

Estou usando o spring 2.6..4

package br.com.alura.forum.config.security;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.builders.WebSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

@EnableWebSecurity
@Configuration
public class SecurityConfigurations extends WebSecurityConfigurerAdapter {

    @Autowired
    private AutenticacaoService autenticacaoService;

    //configuracoes de autenticacao
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(autenticacaoService).passwordEncoder(new BCryptPasswordEncoder());
    }

    //configuracoes de autorizacao
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
        .authorizeRequests()
        .antMatchers(HttpMethod.GET, "/topicos").permitAll()
        .antMatchers(HttpMethod.GET, "/topicos/*").permitAll()
        .antMatchers(HttpMethod.POST, "/auth").permitAll()
        .anyRequest().authenticated()
        .and().csrf().disable()
        .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
    }

    //configuracoes de recursos
    @Override
    public void configure(WebSecurity web) throws Exception {

    }

}

package br.com.alura.forum.controller;

import javax.validation.Valid;

import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import br.com.alura.forum.controller.form.LoginForm;

@RestController
@RequestMapping("/auth")
public class AutenticacaoController {

    @PostMapping
    public ResponseEntity<?> autenticar(@RequestBody @Valid  LoginForm form) {

        System.out.println(form.getEmail());
        System.out.println(form.getEmail());

        return ResponseEntity.ok().build();
    }

}

Agradeço muito por qualquer ajuda. Obrigado!