Remove Travis (#393)

.travis.yml

@@ -1,50 +0,0 @@
-language: dart
-
-# necessary to avoid chrome sandboxing issues
-sudo: required
-addons:
-  chrome: stable
-
-# The Chrome addon does not work on windows
-before_install:
-  - if [ $TRAVIS_OS_NAME = windows ]; then choco install googlechrome ; fi
-  - ./tool/install-grpcwebproxy.sh
-  - export PATH="$PATH:/tmp/grpcwebproxy"
-
-# Run against both the dev and stable channel.
-dart:
-  - stable
-  - dev
-
-# Define test tasks to run.
-dart_task:
-  - test: --platform vm
-  - test: --platform chrome
-
-# Only run one instance of the formatter and the analyzer, rather than running
-# them against each Dart version.
-matrix:
-  include:
-  # Wish we could exclude `example` in `analysis_options.yaml` but it seems
-  # blocked by https://github.com/dart-lang/sdk/issues/26212
-  - dart: dev
-    dart_task: dartfmt
-    script:
-    - pub get
-    - dartanalyzer lib test
-    - for example in example/*/; do (cd $example; echo [Analyzing $example]; pub get; dartanalyzer .); done
-    - (cd interop; echo [Analyzing interop]; pub get; dartanalyzer .)
-
-
-# Only building master means that we don't run two builds for each pull request.
-branches:
-  only: [master]
-
-os:
-  - linux
-  - osx
-  - windows
-
-cache:
-  directories:
-    - $HOME/.pub-cache

README.md

@@ -1,7 +1,6 @@
 The [Dart](https://www.dart.dev/) implementation of
 [gRPC](https://grpc.io/): A high performance, open source, general RPC framework that puts mobile and HTTP/2 first.
 
-[![Build Status](https://travis-ci.org/grpc/grpc-dart.svg?branch=master)](https://travis-ci.org/grpc/grpc-dart)
 [![CI status](https://github.com/grpc/grpc-dart/workflows/Dart/badge.svg)](https://github.com/grpc/grpc-dart/actions?query=workflow%3A%22Dart%22+branch%3Amain)
 [![pub package](https://img.shields.io/pub/v/grpc.svg)](https://pub.dev/packages/grpc)