chore: remove unused environment file (#4845)

* Removes the unused envrionment file from the old build process with the Angular CLI

src/e2e-app/environment.ts

@@ -1,7 +0,0 @@
-// The file for the current environment will overwrite this one during build
-// Different environments can be found in config/environment.{dev|prod}.ts
-// The build system defaults to the dev environment
-
-export const environment = {
-  production: false
-};