prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  remove translations for user kinds on backend
  ### Observed behavior
  
  In role kinds we use the string "Classroom Assignable Coach": https://github.com/learningequality/kolibri/blob/develop/kolibri/auth/constants/role_kinds.py#L15
  
  This string is not something that should be user-facing
  
  ### Expected behavior
  
  implementation details hidden from user
  
  ### User-facing consequences
  
  confusing, inconsistent terminology
  
  
  ### Context
  
  https://crowdin.com/translate/kolibri/498/en-es#37506
  
  
  
  </issue>
  <code>
  [start of kolibri/auth/constants/role_kinds.py]
  1 """
  2 This module contains constants representing the kinds of "roles" that a user can have with respect to a Collection.
  3 """
  4 from __future__ import unicode_literals
  5 
  6 from django.utils.translation import ugettext_lazy as _
  7 
  8 ADMIN = "admin"
  9 COACH = "coach"
  10 ASSIGNABLE_COACH = "classroom assignable coach"
  11 
  12 choices = (
  13     (ADMIN, _("Admin")),
  14     (COACH, _("Coach")),
  15     (ASSIGNABLE_COACH, _("Classroom Assignable Coach")),
  16 )
  17
  [end of kolibri/auth/constants/role_kinds.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/kolibri/auth/constants/role_kinds.py b/kolibri/auth/constants/role_kinds.py
  --- a/kolibri/auth/constants/role_kinds.py
  +++ b/kolibri/auth/constants/role_kinds.py
  @@ -3,14 +3,12 @@
   """
   from __future__ import unicode_literals
   
  -from django.utils.translation import ugettext_lazy as _
  -
   ADMIN = "admin"
   COACH = "coach"
   ASSIGNABLE_COACH = "classroom assignable coach"
   
   choices = (
  -    (ADMIN, _("Admin")),
  -    (COACH, _("Coach")),
  -    (ASSIGNABLE_COACH, _("Classroom Assignable Coach")),
  +    (ADMIN, "Admin"),
  +    (COACH, "Coach"),
  +    (ASSIGNABLE_COACH, "Classroom Assignable Coach"),
   )
  
verification_info: {"golden_diff": "diff --git a/kolibri/auth/constants/role_kinds.py b/kolibri/auth/constants/role_kinds.py\n--- a/kolibri/auth/constants/role_kinds.py\n+++ b/kolibri/auth/constants/role_kinds.py\n@@ -3,14 +3,12 @@\n \"\"\"\n from __future__ import unicode_literals\n \n-from django.utils.translation import ugettext_lazy as _\n-\n ADMIN = \"admin\"\n COACH = \"coach\"\n ASSIGNABLE_COACH = \"classroom assignable coach\"\n \n choices = (\n-    (ADMIN, _(\"Admin\")),\n-    (COACH, _(\"Coach\")),\n-    (ASSIGNABLE_COACH, _(\"Classroom Assignable Coach\")),\n+    (ADMIN, \"Admin\"),\n+    (COACH, \"Coach\"),\n+    (ASSIGNABLE_COACH, \"Classroom Assignable Coach\"),\n )\n", "issue": "remove translations for user kinds on backend\n### Observed behavior\r\n\r\nIn role kinds we use the string \"Classroom Assignable Coach\": https://github.com/learningequality/kolibri/blob/develop/kolibri/auth/constants/role_kinds.py#L15\r\n\r\nThis string is not something that should be user-facing\r\n\r\n### Expected behavior\r\n\r\nimplementation details hidden from user\r\n\r\n### User-facing consequences\r\n\r\nconfusing, inconsistent terminology\r\n\r\n\r\n### Context\r\n\r\nhttps://crowdin.com/translate/kolibri/498/en-es#37506\r\n\r\n\n", "before_files": [{"content": "\"\"\"\nThis module contains constants representing the kinds of \"roles\" that a user can have with respect to a Collection.\n\"\"\"\nfrom __future__ import unicode_literals\n\nfrom django.utils.translation import ugettext_lazy as _\n\nADMIN = \"admin\"\nCOACH = \"coach\"\nASSIGNABLE_COACH = \"classroom assignable coach\"\n\nchoices = (\n    (ADMIN, _(\"Admin\")),\n    (COACH, _(\"Coach\")),\n    (ASSIGNABLE_COACH, _(\"Classroom Assignable Coach\")),\n)\n", "path": "kolibri/auth/constants/role_kinds.py"}]}