Remove Travis configuration

.travis.yml

@@ -1,20 +0,0 @@
-language: go
-go:
-  - 1.15.x
-env:
-  - COVER=true
-install:
-  # Fetch dependencies
-  - curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $GOPATH/bin v1.24.0
-  - GO111MODULE=on go mod download
-  - curl -L https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64 > ./cc-test-reporter
-  - chmod +x ./cc-test-reporter
-before_script:
-  - ./cc-test-reporter before-build
-script:
-  - make test
-after_script:
-  - ./cc-test-reporter after-build --exit-code $TRAVIS_TEST_RESULT -t gocov
-sudo: false
-notifications:
-  email: false