Merge pull request #1797 from mattray/circle_ci_removal

CircleCI use appears to have been deprecated in favor of GitHub Actions

.circleci/config.yml

@@ -1,32 +0,0 @@
-version: 2
-jobs:
-  build:
-    machine: true
-    steps:
-      - checkout
-      - run: |
-          TAG=0.1.$CIRCLE_BUILD_NUM
-          docker login -u $DOCKER_USER -p $DOCKER_PASS
-          docker buildx build -t ajaytripathy/kubecost-cost-model:$TAG .
-          docker push ajaytripathy/kubecost-cost-model:$TAG
-  deploy:
-    machine: true
-    steps:
-      - checkout
-      - run: |
-          docker login -u $DOCKER_USER -p $DOCKER_PASS
-          docker buildx build -t ajaytripathy/kubecost-cost-model:latest .
-          docker push ajaytripathy/kubecost-cost-model:latest
-
-workflows:
-  version: 2
-  build-and-deploy:
-    jobs:
-      - build
-      - deploy:
-          requires:
-            - build
-          filters:
-            branches:
-              only:
-                - master