fix(@schematics/angular): Update environment reference to Angular CLI configuration file

Author: brandonroberts

packages/schematics/angular/application/files/src/environments/environment.ts

@@ -1,7 +1,6 @@
-// The file contents for the current environment will overwrite these during build.
-// The build system defaults to the dev environment which uses `environment.ts`, but if you do
-// `ng build --env=prod` then `environment.prod.ts` will be used instead.
-// The list of which env maps to which file can be found in `.angular-cli.json`.
+// This file can be replaced during build by using the `fileReplacements` array.
+// `ng build ---prod` replaces `environment.ts` with `environment.prod.ts`.
+// The list of file replacements can be found in `angular.json`.
 
 export const environment = {
   production: false