Remove travis config

.travis.yml

@@ -1,33 +0,0 @@
-language: elixir
-elixir: '1.10.3'
-otp_release: '21.1'
-services:
-  - postgresql
-  - docker
-before_install:
-  - echo "CREATE DATABASE plausible_test" > $HOME/init.sql
-  - docker pull yandex/clickhouse-server
-  - docker run -d -p 8123:8123 --ulimit nofile=262144:262144 --volume=$HOME/init.sql:/docker-entrypoint-initdb.d/init.sql yandex/clickhouse-server
-  # setting up postgres 12 is quite a pain, see:
-  # https://travis-ci.community/t/test-against-postgres-12/6768/8
-  - sudo sed -i 's/port = 5433/port = 5432/' /etc/postgresql/12/main/postgresql.conf
-  - sudo cp /etc/postgresql/{9.4,12}/main/pg_hba.conf
-  - sudo pg_ctlcluster 12 main restart
-env:
-  - MIX_ENV=test PGVER=12
-script: mix coveralls.travis
-addons:
-    postgresql: '12'
-    apt:
-      packages:
-        - postgresql-12
-        - postgresql-client-12
-cache:
-  directories:
-    - _build
-    - deps
-deploy:
-  provider: script
-  script: bash docker_push
-  on:
-    branch: master