Update post-install.md

docs/en/src/post-install.md

@@ -16,14 +16,6 @@ Then
 **[copy from here][2]**
 and remove / comment out what you don't want to customize.
 
-> **Note:** You don't generally need to create the config file. You can use the
-> default configuration for basic operations. However, creating the config file
-> is recommended because the project is in its early stage and the defaults
-> might change. Creating the config file will save you from unexpected behavior
-> when you [upgrade][3].
-> Also, the default configuration is meant to be overwritten to suit your
-> workflow.
-
 ## Run
 
 ```