Remove everything from CMS/LMS startup.py except single monkey-patch.

Move mimetype addition to common initialization.

cms/startup.py

 """
-Module with code executed during Studio startup
+Module for code that should run during Studio startup (deprecated)
 """
 
 import django
 from django.conf import settings
 
 from openedx.core.djangoapps.monkey_patch import django_db_models_options
-from openedx.core.lib.django_startup import autostartup
 
 # Force settings to run so that the python path is modified
 
@@ -23,21 +22,3 @@ def run():
     django_db_models_options.patch()
 
     django.setup()
-
-    autostartup()
-
-    add_mimetypes()
-
-
-def add_mimetypes():
-    """
-    Add extra mimetypes. Used in xblock_resource.
-
-    If you add a mimetype here, be sure to also add it in lms/startup.py.
-    """
-    import mimetypes
-
-    mimetypes.add_type('application/vnd.ms-fontobject', '.eot')
-    mimetypes.add_type('application/x-font-opentype', '.otf')
-    mimetypes.add_type('application/x-font-ttf', '.ttf')
-    mimetypes.add_type('application/font-woff', '.woff')

lms/startup.py

 """
-Module for code that should run during LMS startup
+Module for code that should run during LMS startup (deprecated)
 """
 
-import logging
-
 import django
 from django.conf import settings
 
+from openedx.core.djangoapps.monkey_patch import django_db_models_options
+
 # Force settings to run so that the python path is modified
 
 settings.INSTALLED_APPS  # pylint: disable=pointless-statement
 
-from openedx.core.lib.django_startup import autostartup
-
-from openedx.core.djangoapps.monkey_patch import django_db_models_options
-
-log = logging.getLogger(__name__)
-
 
 def run():
     """
@@ -28,21 +22,3 @@ def run():
     django_db_models_options.patch()
 
     django.setup()
-
-    autostartup()
-
-    add_mimetypes()
-
-
-def add_mimetypes():
-    """
-    Add extra mimetypes. Used in xblock_resource.
-
-    If you add a mimetype here, be sure to also add it in cms/startup.py.
-    """
-    import mimetypes
-
-    mimetypes.add_type('application/vnd.ms-fontobject', '.eot')
-    mimetypes.add_type('application/x-font-opentype', '.otf')
-    mimetypes.add_type('application/x-font-ttf', '.ttf')
-    mimetypes.add_type('application/font-woff', '.woff')

openedx/core/djangoapps/common_initialization/apps.py

@@ -12,3 +12,15 @@ class CommonInitializationConfig(AppConfig):
     def ready(self):
         # Common settings validations for the LMS and CMS.
         from . import checks
+        self._add_mimetypes()
+
+    def _add_mimetypes(self):
+        """
+        Add extra mimetypes. Used in xblock_resource.
+        """
+        import mimetypes
+
+        mimetypes.add_type('application/vnd.ms-fontobject', '.eot')
+        mimetypes.add_type('application/x-font-opentype', '.otf')
+        mimetypes.add_type('application/x-font-ttf', '.ttf')
+        mimetypes.add_type('application/font-woff', '.woff')

openedx/core/lib/django_startup.py

-"""
-Automatic execution of startup modules in Django apps.
-"""
-
-from importlib import import_module
-
-from django.conf import settings
-
-
-def autostartup():
-    """
-    Execute app.startup:run() for all installed django apps
-    """
-    for app in settings.INSTALLED_APPS:
-        # See if there's a startup module in each app.
-        try:
-            mod = import_module(app + '.startup')
-        except ImportError:
-            continue
-
-        # If the module has a run method, run it.
-        if hasattr(mod, 'run'):
-            mod.run()