chore: remove codecov.io (#329)

Author: Xiaoyi Chen

.circleci/config.yml

@@ -2,7 +2,6 @@
 version: 2.1
 
 orbs:
-    codecov: codecov/codecov@1.0.5
     browser-tools: circleci/browser-tools@0.1.3
     win: circleci/windows@2.4.0
     node: circleci/node@3.0.1
@@ -147,9 +146,6 @@ jobs:
             - run: yarn lint:ci
             - run: yarn test:ci
             - run: yarn test:e2e-ci
-            - codecov/upload:
-                  file: reports/coverage/*.json
-                  flags: frontend,backend
             - store-results
             - persist_to_workspace:
                   root: .

.npmignore

@@ -17,7 +17,6 @@
 .eslintrc.js
 .nvmrc
 .prettierrc.json
-codecov.yml
 jest.config.js
 lint-staged.config.js
 tsconfig.json

README.md

@@ -2,7 +2,6 @@
 
 [![CircleCI](https://circleci.com/gh/forcedotcom/lwc-dev-server.svg?style=svg&circle-token=19ea057fcc409cec956c360fc347b727d0429396)](https://circleci.com/gh/forcedotcom/lwc-dev-server)
 [![Build status](https://ci.appveyor.com/api/projects/status/ix3iloviwyyg4agt/branch/master?svg=true)](https://ci.appveyor.com/project/forcedotcom/lwc-dev-server/branch/master)
-[![codecov](https://codecov.io/gh/forcedotcom/lwc-dev-server/branch/master/graph/badge.svg?token=LJxxclDlYz)](https://codecov.io/gh/forcedotcom/lwc-dev-server)
 [![MIT license](http://img.shields.io/badge/license-MIT-brightgreen.svg)](http://opensource.org/licenses/MIT)
 ![npm (scoped)](https://img.shields.io/npm/v/@salesforce/lwc-dev-server)
 [![Commitizen friendly](https://img.shields.io/badge/commitizen-friendly-brightgreen.svg)](http://commitizen.github.io/cz-cli/)