[bitnami/keycloak] Remove reference to defunct environment variables …

…in documentation (#40948)

Remove reference to defunct environment variables in Keycloak documentation

Signed-off-by: Damiano Albani <damiano.albani@gmail.com>

bitnami/keycloak/README.md

@@ -80,8 +80,6 @@ The Bitnami Keycloak container can create a default admin user by setting the fo
 * `KEYCLOAK_CREATE_ADMIN_USER`: Create administrator user on boot. Default: **true**.
 * `KEYCLOAK_ADMIN_USER`: Administrator default user. Default: **user**.
 * `KEYCLOAK_ADMIN_PASSWORD`: Administrator default password. Default: **bitnami**.
-* `KEYCLOAK_MANAGEMENT_USER`: WildFly default management user. Default: **manager**.
-* `KEYCLOAK_MANAGEMENT_PASSWORD`: WildFly default management password. Default: **bitnami1**.
 
 ### Connecting to a database