Drop not used templates

weblate/html/registration/activate.html

-{% extends "base.html" %}
-{% load url from future %}
-{% load i18n %}
-
-{% block content %}
-
-<h2>{% trans "Your account could not be activated" %}</h2>
-<p>
-    {% blocktrans count expiration_days as days %}This may be because it is already active or because you waited over {{ days }} day to activate it.{% plural %}This may be because it is already active or because you waited over {{ days }} days to activate it.{% endblocktrans %}
-    {% url 'register' as reg_url %}
-    {% url 'contact' as contact_url %}
-    {% blocktrans %}If this is not the case, please <a href="{{ contact_url }}">contact</a> the website administrator. Otherwise, you may <a href="{{ reg_url }}">register again</a>.{% endblocktrans %}
-</p>
-
-{% endblock %}

weblate/html/registration/activation_complete.html

-{% extends "base.html" %}
-{% load url from future %}
-{% load i18n %}
-
-{% block content %}
-
-<p>
-    {% blocktrans %}Thank you. Your account is now activated.{% endblocktrans %}
-</p>
-<p>
-    {% url 'profile' as profile_url %}
-    {% blocktrans %}You might want to <a href="{{ profile_url }}">adjust your profile</a> now.{% endblocktrans %}
-</p>
-
-{% endblock %}

weblate/html/registration/password_change_done.html

-{% extends "base.html" %}
-{% load i18n %}
-
-{% block content %}
-
-<p>{% trans 'Your password was changed.' %}</p>
-
-{% endblock %}

weblate/html/registration/password_change_form.html

-{% extends "base.html" %}
-{% load i18n %}
-
-{% block content %}
-
-<form action="" method="post">{% csrf_token %}
-{% if form.errors %}
-<div class="ui-widget">
-    <div style="padding: 0pt 0.7em;" class="ui-state-error ui-corner-all"> 
-        <p><span style="float: left; margin-right: 0.3em;" class="ui-icon ui-icon-alert"></span>
-    {% blocktrans count form.errors.items|length as counter %}Please correct the error below.{% plural %}Please correct the errors below.{% endblocktrans %}
-        </p>
-    </div>
-</div>
-{% endif %}
-
-<p>{% trans "Please enter your old password, for security's sake, and then enter your new password twice so we can verify you typed it in correctly." %}</p>
-
-<table>
-{{ form.as_table }}
-</table>
-<input type="submit" value="{% trans 'Change my password' %}" class="button" />
-
-</form>
-
-{% endblock %}