chore: remove circleci as tests now run in github actions

.circleci/config.yml

@@ -1,23 +0,0 @@
-version: 2.1
-
-orbs:
-  python: circleci/python@0.3.2
-
-jobs:
-  build-and-test:
-    executor: python/default
-    steps:
-      - checkout
-      - python/load-cache
-      - run:
-          command: pip install flake8
-          name: Install dependencies
-      - python/save-cache
-      - run:
-          command: flake8 --ignore=E501
-          name: Lint
-
-workflows:
-  main:
-    jobs:
-      - build-and-test