Remove .travis.yml

This file doesn't appear to be used any more, since the builds are run using
GitHub Actions.

This file is affected by the recent Codecov Bash Uploader exploit[1], but since it
hasn't been running, I don't think the project is affected.

[1] https://about.codecov.io/security-update/

.travis.yml

@@ -1,130 +0,0 @@
-dist: trusty
-language: go
-go:
-  - '1.14.x'
-  - '1.13.x'
-
-env:
-  global:
-    - GO_VERSION_FOR_JVM='1.11.x'
-    - CGO_ENABLED=0
-    - GO111MODULE=on
-    - ONIGURUMA_VERSION='6.9.1'
-  matrix:
-    - ONIGURUMA=0
-    - ONIGURUMA=1
-
-stages:
-  - name: test
-  - name: release
-    if: tag IS present
-  - name: publish
-    if: tag IS present
-
-install:
-  - >
-    if [[ "${ONIGURUMA}" -gt 0 ]]; then
-      export CGO_ENABLED=1
-      export GO_TAGS='oniguruma'
-      # install oniguruma manually as trusty has only ancient 5.x
-      sudo apt-get install -y dpkg # dpkg >= 1.17.5ubuntu5.8 fixes https://bugs.launchpad.net/ubuntu/+source/dpkg/+bug/1730627
-      wget "http://archive.ubuntu.com/ubuntu/pool/universe/libo/libonig/libonig5_${ONIGURUMA_VERSION}-1_amd64.deb"
-      sudo dpkg -i "libonig5_${ONIGURUMA_VERSION}-1_amd64.deb"
-      wget "http://archive.ubuntu.com/ubuntu/pool/universe/libo/libonig/libonig-dev_${ONIGURUMA_VERSION}-1_amd64.deb"
-      sudo dpkg -i "libonig-dev_${ONIGURUMA_VERSION}-1_amd64.deb"
-    fi;
-script:
-  - go test ./...
-after_success:
-  - bash <(curl -s https://codecov.io/bash)
-
-jobs:
-  include:
-    - name: 'java unit-tests'
-      stage: test
-      language: scala
-      jdk: oraclejdk8
-      install:
-        - export CGO_ENABLED=1
-        - eval "$(curl -sL https://raw.githubusercontent.com/travis-ci/gimme/master/gimme | GIMME_GO_VERSION=$GO_VERSION_FOR_JVM bash)"
-        - go version
-      before_script:
-        - cd java
-        - make
-      script:
-        - make test
-
-    - name: 'linux packages'
-      stage: release
-      install:
-        - go version
-      script: make packages
-      deploy:
-        provider: releases
-        api_key:
-          secure: $GITHUB_TOKEN
-        file_glob: true
-        file: build/*.tar.gz
-        skip_cleanup: true
-        on:
-          tags: true
-
-    - name: 'linux shared lib'
-      stage: release
-      install:
-        - go version
-      script: make linux-shared
-      deploy:
-        provider: releases
-        api_key:
-          secure: $GITHUB_TOKEN
-        file:
-          - ./.shared/linux-x86-64/libenry.so
-        skip_cleanup: true
-        on:
-          tags: true
-
-    - name: 'macOS shared lib'
-      stage: release
-      env:
-        - OSXCROSS_PACKAGE="osxcross_3034f7149716d815bc473d0a7b35d17e4cf175aa.tar.gz"
-        - OSXCROSS_URL="https://github.com/bblfsh/client-scala/releases/download/v1.5.2/${OSXCROSS_PACKAGE}"
-        - PATH="/$HOME/osxcross/bin:$PATH"
-      install:
-        - go version
-        - sudo apt-get update
-        - sudo apt-get install -y --no-install-recommends clang g++ gcc gcc-multilib libc6-dev libc6-dev-i386 mingw-w64 patch xz-utils
-        - cd ${HOME}
-        - curl -sfSL ${OSXCROSS_URL} | tar -C ${HOME} -xzf -
-        - cd $GOPATH/src/github.com/bzz/enry
-      script: make darwin-shared
-      deploy:
-        provider: releases
-        api_key:
-          secure: $GITHUB_TOKEN
-        file: ./.shared/darwin/libenry.dylib
-        skip_cleanup: true
-        on:
-          tags: true
-
-    - name: 'java: publish to maven'
-      stage: publish
-      language: scala
-      jdk: oraclejdk8
-      install:
-        - export CGO_ENABLED=1
-        - eval "$(curl -sL https://raw.githubusercontent.com/travis-ci/gimme/master/gimme | GIMME_GO_VERSION=$GO_VERSION_FOR_JVM bash)"
-        - go version
-      before_script:
-        - cd java
-        - make
-        - curl -o ./shared/linux-x86-64/libenry.so -sfL "https://github.com/$TRAVIS_REPO_SLUG/releases/download/$TRAVIS_TAG/libenry.so" || travis_terminate 1
-        - mkdir -p ./shared/darwin
-        - curl -o ./shared/darwin/libenry.dylib -sfL "https://github.com/$TRAVIS_REPO_SLUG/releases/download/$TRAVIS_TAG/libenry.dylib" || travis_terminate 1
-        - openssl aes-256-cbc -K $encrypted_a0e1c69dbbc7_key -iv $encrypted_a0e1c69dbbc7_iv -in key.asc.enc -out key.asc -d
-        - gpg --no-default-keyring --primary-keyring ./project/.gnupg/pubring.gpg --secret-keyring ./project/.gnupg/secring.gpg --keyring ./project/.gnupg/pubring.gpg --fingerprint --import key.asc
-      script:
-        - make test # ensure the shared objects are functional
-        - ./sbt publishLocal
-        - ./sbt publishSigned
-        - ./sbt sonatypeRelease