chore(repo): remove esm for watch modes from onboarding guidelines

CONTRIBUTING.md

@@ -109,15 +109,15 @@ Run watch mode while editing (auth for example):
 
 ```
 npx lerna exec --scope @aws-amplify/auth yarn link
-npx lerna exec --scope @aws-amplify/auth yarn build:esm:watch
+npx lerna exec --scope @aws-amplify/auth yarn build:watch
 ```
 
 Or run the whole library in watch mode if you are working on multiple packages
 
 ```
 yarn build # Build the whole library
 yarn link-all # Make all the packages available to link
-yarn build:esm:watch # All packages are building ES6 modules in watch mode
+yarn build:watch # All packages are building in watch mode
 ```
 
 In your sample project, you can now link specific packages

packages/datastore/docs/contributing.md

@@ -5,10 +5,10 @@
 
 ## Testing DataStore changes locally
 - On first build:
-	- Within **amplify-js**: `yarn && yarn build && yarn link-all && yarn build:esm:watch`
+	- Within **amplify-js**: `yarn && yarn build && yarn link-all && yarn build:watch`
 	- Within sample app: `yarn && yarn link aws-amplify && yarn link @aws-amplify/datastore && yarn start`
 - On subsequent builds (useful if something isn't working):
-	- Within **amplify-js**: `yarn clean && yarn build && yarn link-all && yarn build:esm:watch`
+	- Within **amplify-js**: `yarn clean && yarn build && yarn link-all && yarn build:watch`
 	- Within sample app: `rm -rf node_modules && yarn && yarn link aws-amplify && yarn link @aws-amplify/datastore && yarn start`
 
 ## Contributing to these docs