Revert "Merge branch 'announcement' into 'master'"

This reverts merge request !5

widget_k3git/announcement/admin.py

-from django.contrib import admin
-
-# Register your models here.

widget_k3git/announcement/apps.py

-from django.apps import AppConfig
-
-
-class AnnouncementConfig(AppConfig):
-    default_auto_field = 'django.db.models.BigAutoField'
-    name = 'announcement'

widget_k3git/announcement/models.py

-from django.db import models
-
-# Create your models here.

widget_k3git/announcement/tests.py

-from django.test import TestCase
-
-# Create your tests here.

widget_k3git/announcement/views.py

-from django.shortcuts import render
-
-# Create your views here.