Remove travis because now all *should* be done via Github actions

.travis.yml

@@ -1,45 +0,0 @@
-language: python
-
-cache: pip
-
-python:
-  - '2.7'
-  - '3.4'
-  - '3.5'
-  - '3.6'
-  - '3.7'
-  - '3.8'
-  - '3.9'
-  - pypy3
-
-install:
-  - pip install -r requirements.txt
-  - pip install coveralls
-
-script:
-  - pip install .
-  - coverage run --source=glances unitest.py
-
-after_success:
-  - coveralls
-
-deploy:
-  - provider: pypi
-    user: nicolargo
-    password:
-      secure: Fms23jiiKKq6qJMsZYrmBz5mC753VGrjCxzVrsioENfH3KaFf6kUc9fTYntaLvjLPTNBkU3R2IORfVOikJKmNWqWVZOdJ/nq8zPl6o9MgdNcX7qWTvY8Fi9MW7tIZHrehhm0LvWFVq8ZSc8iYzw3/741lvBh8vpJZSQs3sq/1QI=
-    on:
-      tags: true
-      branch: master
-      distributions: sdist bdist_wheel
-      repo: nicolargo/glances
-  - provider: pypi
-    server: https://test.pypi.org/legacy/
-    user: nicolargo
-    password:
-      secure: kxchYP3VJWe74jun0rJjuEFFpnO2sF3WHsK5Axlz4flJ6dtX0OPeZd9SlqgMX7cv9FHcXxyukVKrw4PHVqUNcWoaKM8TNeddKkGeSjcVY5C7NIExXh5es4SguozdT4cckoJUyN2xXc7cUAM68CHWfxijR6NiDMXIuMJrZumye6c=
-    on:
-      tags: false
-      branch: develop
-      distributions: sdist bdist_wheel
-      repo: nicolargo/glances