Fix bazinga usage (#2500)

(cherry picked from commit 800daf9)

Author: adriendupuis

docs/guide/back_office_translations.md

@@ -30,7 +30,7 @@ If your browser language is set to French, the Back Office will be displayed in
 
     `ezplatform.system.<siteaccess>.user_preferences.additional_translations: ['pl_PL', 'fr_FR']`
 
-    Then, run `composer run post-update-cmd` and clear the cache.
+    Then, run `composer run post-update-cmd` and `php bin/console cache:clear --siteaccess=admin`.
 
 ### Contributing Back Office translations
 
@@ -120,4 +120,8 @@ The language to display will then be selected automatically based on [user prefe
 
 !!! note
 
-    You may need to clear the cache after adding new translations, before they are available in the Back Office.
+    Run `composer run post-update-cmd` which installs your JavaScript translations by using `BazingaJsTranslationBundle`,
+    and clears the cache of the default SiteAccess.
+
+    Run `php bin/console cache:clear --siteaccess=admin` to clear the Back Office cache.
+    You may need to replace `admin` with the Back Office's SiteAccess name used in your installation.

docs/guide/project_organization.md

@@ -28,15 +28,6 @@ They can be referenced as relative to the root, for example `assets/js/script.j
 
 All project assets are accessible through the `assets` path.
 
-??? note "Removing `assets` manually"
-
-    If you ever remove the `assets` folder manually, you need to dump translations before performing
-    the `yarn encore <dev|prod>` command:
-    
-    ```
-    php bin/console bazinga:js-translation:dump assets --merge-domains
-    ```
-
 ## Configuration
 
 You project's configuration is placed in the respective files in `config/packages`.