chore: Remove linting from integration-test project

Version 2.23.2 of `eslint-plugin-import` prefers to `import` statements
above `import type`.

We do not have a lockfile for the `integration-test` project because:

> Ignore package-lock.json to avoid the following error when reinstalling dependencies:
> npm ERR! notarget No matching version found for eslint-plugin-custom-rules@1.0.0.
> This is because we're installing @guardian/cdk from file, which is in turn installing eslint-plugin-custom-rules from file.

Combined this with the version of `eslint-plugin-import` is defined with `^`,
linting is non-deterministic* and we only saw an import order linting error locally
after removing `node_modules`.

There are a couple of ways to improve this:
  - Work out how to use a lockfile in the integration-test
  - Remove linting and hope the other dependencies using `^` versions are OK

This change removes linting, with the justification that:
  - This project is never consumed by anyone
  - This project doesn't run anywhere
  - This project doesn't get updated too often
  - Understanding the original lockfile issues is a time sink

See:
  - import-js/eslint-plugin-import#2021
  - #564

* Well, the entire build of integration-test is non-deterministic!

integration-test/package.json

@@ -12,24 +12,14 @@
     "test:dev": "jest --runInBand --detectOpenHandles --watch",
     "format": "prettier --write \"{src,bin}/**/*.ts\"",
     "cdk": "cdk",
-    "lint": "eslint src/** bin/** --ext .ts --no-error-on-unmatched-pattern",
     "generate": "cdk synth --path-metadata false --version-reporting false"
   },
   "devDependencies": {
     "@guardian/eslint-config-typescript": "^0.5.0",
     "@types/jest": "^26.0.22",
     "@types/node": "15.0.2",
-    "@typescript-eslint/eslint-plugin": "^4.19.0",
-    "@typescript-eslint/parser": "^4.19.0",
     "aws-cdk": "1.103.0",
-    "eslint": "^7.23.0",
-    "eslint-config-prettier": "^8.1.0",
-    "eslint-plugin-custom-rules": "file:../eslint",
-    "eslint-plugin-eslint-comments": "^3.2.0",
-    "eslint-plugin-import": "^2.22.1",
-    "eslint-plugin-prettier": "^3.3.1",
     "jest": "^26.4.2",
-    "prettier": "^2.2.1",
     "ts-jest": "^26.5.4",
     "ts-node": "^9.1.1",
     "typescript": "~4.2.3"

integration-test/script/ci

@@ -8,6 +8,5 @@ set -e
 npm install --no-package-lock
 
 npm run build
-npm run lint
 npm run test
 npm run generate