remove travis, appveyor from project (#22007)

CI/.travis.yml.bash

@@ -1,37 +0,0 @@
-sudo: required
-language: java
-jdk:
-  - openjdk8
-
-cache:
-  directories:
-  - $HOME/.m2
-  - $HOME/.ivy2
-
-services:
-  - docker
-
-addons:
-  hosts:
-    - petstore.swagger.io
-
-before_install:
-  # to run petstore server locally via docker
-  - docker pull swaggerapi/petstore
-  - docker run -d -e SWAGGER_HOST=http://petstore.swagger.io -e SWAGGER_BASE_PATH=/v2 -p 80:8080 swaggerapi/petstore
-  - docker ps -a
-  # Add bats test framework and cURL for Bash script integration tests
-  - sudo add-apt-repository ppa:duggan/bats --yes
-  - sudo apt-get update -qq
-  - sudo apt-get install -qq bats
-  - sudo apt-get install -qq curl
-
-  # show host table to confirm petstore.swagger.io is mapped to localhost
-  - cat /etc/hosts
-
-script:
-  # fail fast
-  - set -e
-  # run integration tests defined in maven pom.xml
-  - cp pom.xml.bash pom.xml
-  - mvn --no-snapshot-updates --batch-mode verify -Psamples

README.md

@@ -16,9 +16,7 @@
 <div align="center">
 
 [Master](https://github.com/OpenAPITools/openapi-generator/tree/master) (`7.16.0`):
-[![Build Status](https://api.travis-ci.com/OpenAPITools/openapi-generator.svg?branch=master&status=passed)](https://app.travis-ci.com/github/OpenAPITools/openapi-generator/builds)
 [![Integration Test2](https://circleci.com/gh/OpenAPITools/openapi-generator.svg?style=shield)](https://circleci.com/gh/OpenAPITools/openapi-generator)
-[![Windows Test](https://ci.appveyor.com/api/projects/status/github/openapitools/openapi-generator?branch=master&svg=true&passingText=Windows%20Test%20-%20OK&failingText=Windows%20Test%20-%20Fails)](https://ci.appveyor.com/project/WilliamCheng/openapi-generator)
 [![Bitrise](https://img.shields.io/bitrise/4a2b10a819d12b67/master?label=bitrise%3A%20Swift+4,5&token=859FMDR8QHwabCzwvZK6vQ)](https://app.bitrise.io/app/4a2b10a819d12b67)
 
 </div>