removed heroku related files

Signed-off-by: murych <murychkun@yahoo.com>

.gitlab-ci.yml

-image: python:alpine
-
-test:
-  stage: test
-  script:
-    - pip install flake8
-    - flake8 --config=tox.ini .
-
-production:
-  type: deploy
-  environment: production
-  script:
-    - apk add --no-cache ruby ruby-rdoc ruby-irb curl ca-certificates git
-    - gem install dpl --no-doc
-    - dpl --provider=heroku --api-key=$HEROKU_PRODUCTION_API_KEY --app=$HEROKU_APP_NAME
-  only:
-    - tags
\ No newline at end of file

Procfile

-web: gunicorn main:app --log-file -
\ No newline at end of file

runtime.txt

-python-3.5.2
\ No newline at end of file

tox.ini

-[flake8]
-# it's not a bug that we aren't using all of hacking
-ignore =
-    # E501: migraion lines are often too long
-    E501
-exclude =
-    .git,
-    __pycache__,
-    templates,
-    static,
-    venv
\ No newline at end of file