prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Remove possibel unused constant
  At first sight looks like isn't used anymore after https://github.com/rtfd/readthedocs.org/pull/5383
  
  https://github.com/rtfd/readthedocs.org/blob/78c34c904b347110b2cd545b4b5a80ed526590f7/readthedocs/core/models.py#L13-L13
  
  We should still double check and make sure tests are passing after the removal.
  
  </issue>
  <code>
  [start of readthedocs/core/models.py]
  1 # -*- coding: utf-8 -*-
  2 
  3 """Models for the core app."""
  4 import logging
  5 
  6 from annoying.fields import AutoOneToOneField
  7 from django.db import models
  8 from django.urls import reverse
  9 from django.utils.translation import ugettext
  10 from django.utils.translation import ugettext_lazy as _
  11 
  12 
  13 STANDARD_EMAIL = 'anonymous@readthedocs.org'
  14 
  15 log = logging.getLogger(__name__)
  16 
  17 
  18 class UserProfile(models.Model):
  19 
  20     """Additional information about a User."""
  21 
  22     user = AutoOneToOneField(
  23         'auth.User',
  24         verbose_name=_('User'),
  25         related_name='profile',
  26     )
  27     whitelisted = models.BooleanField(_('Whitelisted'), default=False)
  28     banned = models.BooleanField(_('Banned'), default=False)
  29     homepage = models.CharField(_('Homepage'), max_length=100, blank=True)
  30     allow_ads = models.BooleanField(
  31         _('See paid advertising'),
  32         help_text=_('If unchecked, you will still see community ads.'),
  33         default=True,
  34     )
  35 
  36     def __str__(self):
  37         return (
  38             ugettext("%(username)s's profile") %
  39             {'username': self.user.username}
  40         )
  41 
  42     def get_absolute_url(self):
  43         return reverse(
  44             'profiles_profile_detail',
  45             kwargs={'username': self.user.username},
  46         )
  47
  [end of readthedocs/core/models.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/readthedocs/core/models.py b/readthedocs/core/models.py
  --- a/readthedocs/core/models.py
  +++ b/readthedocs/core/models.py
  @@ -10,8 +10,6 @@
   from django.utils.translation import ugettext_lazy as _
   
   
  -STANDARD_EMAIL = 'anonymous@readthedocs.org'
  -
   log = logging.getLogger(__name__)
  
verification_info: {"golden_diff": "diff --git a/readthedocs/core/models.py b/readthedocs/core/models.py\n--- a/readthedocs/core/models.py\n+++ b/readthedocs/core/models.py\n@@ -10,8 +10,6 @@\n from django.utils.translation import ugettext_lazy as _\n \n \n-STANDARD_EMAIL = 'anonymous@readthedocs.org'\n-\n log = logging.getLogger(__name__)\n", "issue": "Remove possibel unused constant\nAt first sight looks like isn't used anymore after https://github.com/rtfd/readthedocs.org/pull/5383\r\n\r\nhttps://github.com/rtfd/readthedocs.org/blob/78c34c904b347110b2cd545b4b5a80ed526590f7/readthedocs/core/models.py#L13-L13\r\n\r\nWe should still double check and make sure tests are passing after the removal.\n", "before_files": [{"content": "# -*- coding: utf-8 -*-\n\n\"\"\"Models for the core app.\"\"\"\nimport logging\n\nfrom annoying.fields import AutoOneToOneField\nfrom django.db import models\nfrom django.urls import reverse\nfrom django.utils.translation import ugettext\nfrom django.utils.translation import ugettext_lazy as _\n\n\nSTANDARD_EMAIL = 'anonymous@readthedocs.org'\n\nlog = logging.getLogger(__name__)\n\n\nclass UserProfile(models.Model):\n\n    \"\"\"Additional information about a User.\"\"\"\n\n    user = AutoOneToOneField(\n        'auth.User',\n        verbose_name=_('User'),\n        related_name='profile',\n    )\n    whitelisted = models.BooleanField(_('Whitelisted'), default=False)\n    banned = models.BooleanField(_('Banned'), default=False)\n    homepage = models.CharField(_('Homepage'), max_length=100, blank=True)\n    allow_ads = models.BooleanField(\n        _('See paid advertising'),\n        help_text=_('If unchecked, you will still see community ads.'),\n        default=True,\n    )\n\n    def __str__(self):\n        return (\n            ugettext(\"%(username)s's profile\") %\n            {'username': self.user.username}\n        )\n\n    def get_absolute_url(self):\n        return reverse(\n            'profiles_profile_detail',\n            kwargs={'username': self.user.username},\n        )\n", "path": "readthedocs/core/models.py"}]}