remove unmaintained travis config

As far as I'm aware we use GitHub Actions for our CI needs now.

.travis.yml

@@ -1,57 +0,0 @@
-language: go
-sudo: false
-matrix:
-  include:
-    - go: 1.x
-    - go: 1.13.x
-    - go: 1.x
-      arch: amd64
-    - name: "arch: arm64"
-      go: 1.x
-      arch: arm64
-      env:
-        - PYTHON_COMMAND=python3
-    - name: "arch: i686"
-      go: 1.x
-      arch: amd64
-      env:
-        - PYTHON_COMMAND=python3
-        - GOARCH=386
-        - CGO_ENABLED=1
-        - SKIP_PYTHON_BINDINGS_TESTS=1
-    - name: "arch: ppc64le"
-      go: 1.x
-      arch: ppc64le
-      env:
-        - PYTHON_COMMAND=python3
-    - name: "Bazel Check"
-      go: 1.x
-      script: ./travisBazel.sh
-      before_install:
-        - echo "deb [arch=amd64] https://storage.googleapis.com/bazel-apt stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel.list
-        - curl https://bazel.build/bazel-release.pub.gpg | sudo apt-key add -
-        - sudo apt-get update && sudo apt-get install bazel
-    - name: "Make Check go 1.x"
-      go: 1.x
-      before_install:
-        - echo "deb [arch=amd64] https://storage.googleapis.com/bazel-apt stable jdk1.8" | sudo tee /etc/apt/sources.list.d/bazel.list
-        - curl https://bazel.build/bazel-release.pub.gpg | sudo apt-key add -
-        - sudo apt-get update && sudo apt-get install bazel make
-        - sudo apt install python3-dev
-        - pip install -U pytest --user
-      script: make all
-
-before_install:
-  - sudo apt install python3-dev
-  - pip install -U pytest --user
-  - go get github.com/axw/gocov/gocov
-  - go get github.com/mattn/goveralls
-  - go get github.com/fatih/color
-  - curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.27.0
-  - if ! go get github.com/golang/tools/cmd/cover; then go get golang.org/x/tools/cmd/cover; fi
-  - go get github.com/sergi/go-diff/diffmatchpatch
-
-script: ./travisBuild.sh
-
-env:
-  - PYTHON_COMMAND=python

travisBazel.sh

@@ -1,15 +0,0 @@
-set -e
-set -x
-
-# See: https://github.com/bazelbuild/rules_go#how-do-i-run-bazel-on-travis-ci
-bazel --host_jvm_args=-Xmx500m \
-    --host_jvm_args=-Xms500m \
-    test \
-    --spawn_strategy=standalone \
-    --genrule_strategy=standalone \
-    --test_strategy=standalone \
-    --local_ram_resources=1536 \
-    --noshow_progress \
-    --verbose_failures \
-    --test_output=errors \
-    //:go_default_test

travisBuild.sh

@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-
-set -e
-
-run_tests() {
-  golangci-lint run ./...
-  SKIP_GO_TESTS=1 ./tests.sh
-}
-
-run_tests