Remove travis

Signed-off-by: Julius Härtl <jus@bitgrid.net>

.travis.yml

@@ -1,36 +0,0 @@
-language: php
-services:
-    - mysql
-php:
-    - 7.3
-env:
-    - CORE_BRANCH=master DB=mysql
-
-matrix:
-  include:
-  - php: 7.2
-    env: "DB=sqlite CORE_BRANCH=stable20"
-
-before_install:
-    - export PATH="$PWD/vendor/bin:$PATH"
-    - phpunit --version
-    - wget https://raw.githubusercontent.com/nextcloud/travis_ci/master/before_install.sh
-    - bash ./before_install.sh deck $CORE_BRANCH $DB
-    - cd ../server
-    - ./occ app:enable deck
-
-before_script:
-    - cd apps/deck
-
-script:
-    - composer install
-    - make test-unit
-
-after_success:
-    - bash <(curl -s https://codecov.io/bash)
-
-after_failure:
-    - cat ../../data/nextcloud.log
-
-notifications:
-  email: false