Как убрать "* Обязательное поле" из шаблона?

Не могу понять откуда в шаблоне берется errorlist "* Обязательное поле" и как его убрать.. В качестве вывода формы использую AuthenticationForm, стили - bootstrap.

login.html

{% extends 'authapp/base.html' %}
{% load static %}

<section class="row text-center">
    <legend class="text-center"><h1>Авторизация</h1></legend>
    <div class="col"></div>
    <form class="col form-group" action="{% url 'auth:login' %}"
          method="post">
      {% csrf_token %}
      {{ login_form }}
      <br>
      <input class="form-control btn btn-primary" type="submit" value="войти">
    </form>
    <div class="col"></div>
  </section>

views.py

def login(request):
title = 'вход'

login_form = InstallerUserLoginForm(data=request.POST)

if request.method == 'POST' and login_form.is_valid():
    username = request.POST['username']
    password = request.POST['password']

    user = auth.authenticate(username=username, password=password)
    if user and user.is_active:
        auth.login(request, user)
        return HttpResponseRedirect(reverse('mainapp:index'))

content = {'title': title, 'login_form': login_form}
return render(request, 'authapp/login.html', content)

forms.py

from django.contrib.auth.forms import AuthenticationForm
from django import forms
import random, hashlib


class InstallerUserLoginForm(AuthenticationForm):
    class Meta:
        model = InstallerUser
        fields = ('username', 'password')

    def __init__(self, *args, **kwargs):
        super(InstallerUserLoginForm, self).__init__(*args, **kwargs)
        for field_name, field in self.fields.items():
            field.widget.attrs['class'] = 'form-control'

        content = {'title': title, 'login_form': login_form}
        return render(request, 'authapp/login.html', content)

models.py

class InstallerUser(AbstractUser):
    """Информация об инсталляторе"""
    name = models.CharField(verbose_name='Наименование инсталлятора',
                            max_length=128)
    specialist_fio = models.CharField(
        verbose_name='ФИО специалиста',
        max_length=128)
    phone_number = PhoneNumberField(
        verbose_name='Телефон', max_length=128
    )
    email = models.EmailField(
        verbose_name='Электронная почта (email)', max_length=254
    )
    fax = PhoneNumberField(verbose_name='Факс')