[#6] Remove .travis.yml

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

.travis.yml

@@ -1,17 +0,0 @@
-language: go
-go:
-  - 1.11.x
-  - 1.12.x
-env:
-  - GO111MODULE=on
-install:
-  - go get -v golang.org/x/lint/golint
-  - go mod tidy -v
-script:
-  - golint -set_exit_status ./...
-  - go test -race -coverprofile=coverage.txt -covermode=atomic ./...
-after_success:
-  - bash <(curl -s https://codecov.io/bash)
-matrix:
-  allow_failures:
-    - go: tip