CI: remove travis

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

.travis.yml

@@ -1,24 +0,0 @@
-dist: bionic
-language: go
-
-go:
-  - "1.13.x"
-  - "1.15.x"
-
-install:
-  # Don't change local go.{mod, sum} by go get tools.
-  #
-  # ref: https://github.com/golang/go/issues/27643
-  - pushd ..; go get -u github.com/vbatts/git-validation; popd
-  - pushd ..; go get -u github.com/kunalkushwaha/ltag; popd
-
-before_script:
-  - pushd ..; git clone https://github.com/containerd/project; popd
-
-script:
-  - DCO_VERBOSITY=-q ../project/script/validate/dco
-  - ../project/script/validate/fileheader ../project/
-  - go test -v -race -covermode=atomic -coverprofile=coverage.txt ./...
-
-after_success:
-  - bash <(curl -s https://codecov.io/bash)

README.md

@@ -1,7 +1,6 @@
 # ttrpc
 
 [![Build Status](https://github.com/containerd/ttrpc/workflows/CI/badge.svg)](https://github.com/containerd/ttrpc/actions?query=workflow%3ACI)
-[![Build Status](https://travis-ci.org/containerd/ttrpc.svg?branch=master)](https://travis-ci.org/containerd/ttrpc)
 
 GRPC for low-memory environments.