How to get rid of the warning .ts file is part of the TypeScript compilation but it's unused

Question

I Just updated angular to latest 9.0.0-next.4. I am not using routing but suddenly after updating I keep seeing this warning. How Do I remove this warning

Answer 1

Updated to Angular 9 today and got warnings. My solution was add this "files" array without the "src" in the path. Just added:

 "files": [
    "main.ts",
    "polyfills.ts"
  ],

My full tsconfig.app.json file is:

{
  "extends": "../tsconfig.json",
  "compilerOptions": {
    "outDir": "../out-tsc/app",
    "module": "es2015",
    "types": ["node"]
  },
  "files": [
    "main.ts",
    "polyfills.ts"
  ],
  "exclude": [
    "src/test.ts",
    "**/*.spec.ts"
  ]
}