Remove requirements files

This commit removes the requirements files to avoid confusion with
the pipenv dependency management

requirements.txt

@@ -1,3 +0,0 @@
-# This file is here because many Platforms as a Service look for
-# requirements.txt in the root directory of a project.
--r requirements/production.txt

requirements/base.txt

@@ -1,8 +0,0 @@
-amqp==1.4.9
-bpython==0.13.2
-anyjson==0.3.3
-billiard==3.3.0.23
-celery==3.1.26.post2
-kombu==3.0.37
-pytz==2019.1
-Jinja2==2.7.3

requirements/local.txt

@@ -1,6 +0,0 @@
-# Local development dependencies go here
--r base.txt
-coverage==3.7.1
-Sphinx==1.2.3
-sqlparse==0.1.19
-releases==0.7.0

requirements/production.txt

@@ -1,3 +0,0 @@
-# Pro-tip: Try not to put anything here. There should be no dependency in
-#	production that isn't in development.
--r base.txt

requirements/test.txt

@@ -1,3 +0,0 @@
-# Test dependencies go here.
--r base.txt
-coverage==3.7.1