Completely remove Pagedown

.flake8

@@ -18,9 +18,6 @@ per-file-ignores =
     ./judge/management/commands/runmoss.py:F403,F405
     # E501: line too long, ignore in migrations
     ./judge/migrations/*.py:E501
-    # E303: too many blank lines
-    # PyCharm likes to have double lines between class/def in an if statement.
-    ./judge/widgets/pagedown.py:E303
 exclude =
     # belongs to the user
     ./dmoj/local_settings.py,

.gitmodules

@@ -1,7 +1,3 @@
-[submodule "resources/pagedown"]
-	path = resources/pagedown
-	url = https://github.com/DMOJ/dmoj-pagedown.git
-	branch = master
 [submodule "resources/libs"]
 	path = resources/libs
 	url = https://github.com/DMOJ/site-assets.git

dmoj/settings.py

@@ -269,7 +269,6 @@
     'social_django',
     'compressor',
     'django_ace',
-    'pagedown',
     'sortedm2m',
     'statici18n',
     'impersonate',

judge/widgets/__init__.py

@@ -1,5 +1,4 @@
 from judge.widgets.checkbox import CheckboxSelectMultipleWithSelectAll
 from judge.widgets.martor import *
 from judge.widgets.mixins import CompressorWidgetMixin
-from judge.widgets.pagedown import *
 from judge.widgets.select2 import *

requirements.txt

@@ -1,7 +1,6 @@
 Django>=3.2,<4
 django_compressor>=3
 django-mptt>=0.13
-django-pagedown<2
 django-registration-redux>=2.10
 django-reversion>=3.0.5,<4
 django-social-share