Remove circleCI

Using GitHub actions now.

Signed-off-by: Justin Cormack <justin@specialbusservice.com>

.circleci/config.yml

@@ -1,62 +0,0 @@
-version: 2
-jobs:
-  build:
-    working_directory: /go/src/github.com/linuxkit/linuxkit
-    docker:
-      - image: circleci/golang:1.11-stretch
-    steps:
-      - checkout
-      - run: mkdir -p ./bin
-      - run:
-          name: Versions
-          command: |
-            set -x
-            go version
-            cat /etc/os-release
-      - run:
-          name: Dependencies
-          command: |
-            go get -u golang.org/x/lint/golint
-            go get -u github.com/gordonklaus/ineffassign
-      - run:
-          name: Lint
-          command: make local-check
-      - run:
-          name: Build amd64/linux
-          environment:
-            GOOS: linux
-            GOARCH: amd64
-          command: make LOCAL_TARGET=bin/linuxkit-$GOOS-$GOARCH local-build
-      - run:
-          name: Build arm64/linux
-          environment:
-            GOOS: linux
-            GOARCH: arm64
-          command: make LOCAL_TARGET=bin/linuxkit-$GOOS-$GOARCH local-build
-      - run:
-          name: Build s390x/linux
-          environment:
-            GOOS: linux
-            GOARCH: s390x
-          command: make LOCAL_TARGET=bin/linuxkit-$GOOS-$GOARCH local-build
-      - run:
-          name: Build amd64/darwin
-          environment:
-            GOOS: darwin
-            GOARCH: amd64
-          command: make LOCAL_TARGET=bin/linuxkit-$GOOS-$GOARCH local-build
-      - run:
-          name: Build amd64/windows
-          environment:
-            GOOS: windows
-            GOARCH: amd64
-          command: make LOCAL_TARGET=bin/linuxkit-$GOOS-$GOARCH.exe local-build
-      - run:
-          name: Test
-          command: make local-test
-      - run:
-          name: Checksum
-          command: cd bin && sha256sum linuxkit-*-* > SHA256SUM
-      - store_artifacts:
-          path: ./bin
-          destination: .