Remove WhiteNoise

We’re now serving assets from S3 when running on PaaS. So we’ll set
the appropriate caching headers there or in Cloudfront. This means that
the app no longer needs to serve cache headers, which is what we were
using WhiteNoise for.

This commits removes WhiteNoise in favour of letting Flask handle the
serving of static assets.

application.py

@@ -1,16 +1,6 @@
-import os
-
 from flask import Flask
-from whitenoise import WhiteNoise
-
 from app import create_app
 
-PROJECT_ROOT = os.path.dirname(os.path.abspath(__file__))
-STATIC_ROOT = os.path.join(PROJECT_ROOT, 'app', 'static')
-STATIC_URL = 'static/'
+application = Flask('app')
 
-flask_app = Flask('app')
-
-create_app(flask_app)
-
-application = WhiteNoise(flask_app.wsgi_app, STATIC_ROOT, STATIC_URL, max_age=WhiteNoise.FOREVER)
+create_app(application)

requirements-app.txt

@@ -14,7 +14,6 @@ pyexcel-xlsx==0.5.6
 pyexcel-ods3==0.5.3
 pytz==2018.7
 gunicorn==19.7.1  # >19.8 stops eventlet workers after a timeout
-whitenoise==4.1.2  #manages static assets
 eventlet==0.24.1
 notifications-python-client==5.2.0
 

requirements.txt

@@ -16,7 +16,6 @@ pyexcel-xlsx==0.5.6
 pyexcel-ods3==0.5.3
 pytz==2018.7
 gunicorn==19.7.1  # >19.8 stops eventlet workers after a timeout
-whitenoise==4.1.2  #manages static assets
 eventlet==0.24.1
 notifications-python-client==5.2.0
 
@@ -29,10 +28,10 @@ itsdangerous==0.24  # pyup: <1.0.0
 git+https://github.com/alphagov/notifications-utils.git@30.7.1#egg=notifications-utils==30.7.1
 
 ## The following requirements were added by pip freeze:
-awscli==1.16.75
+awscli==1.16.80
 bleach==2.1.3
 boto3==1.6.16
-botocore==1.12.65
+botocore==1.12.70
 certifi==2018.11.29
 chardet==3.0.4
 Click==7.0
@@ -76,5 +75,5 @@ urllib3==1.24.1
 webencodings==0.5.1
 Werkzeug==0.14.1
 WTForms==2.2.1
-xlrd==1.1.0
+xlrd==1.2.0
 xlwt==1.3.0