removed unused code and improved readability

Author: EveryDataStoreDeveloper

.env.exsample

@@ -8,7 +8,7 @@ SS_DATABASE_USERNAME=""
 SS_DATABASE_PASSWORD=""
 SS_DATABASE_NAME=""
 SS_DEFAULT_ADMIN_USERNAME="admin"
-SS_DEFAULT_ADMIN_PASSWORD="yourchallange"
+SS_DEFAULT_ADMIN_PASSWORD="myadminpassword"
 SS_ERROR_LOG="log/silverstripe.log"
 # WARNING: in a live environment, change this to "live" instead of dev
 SS_ENVIRONMENT_TYPE="dev"