Refs #20629: Update env.var. without positional arguments

Signed-off-by: cferreiragonz <carlosferreira@eprosima.com>

Author: cferreiragonz

docs/fastdds/env_vars/env_vars.rst

@@ -221,45 +221,32 @@ Setting this variable configures the :ref:`DomainParticipant<dds_layer_domainPar
 * If no port is specified when using default UDP transport, the default port 11811 is used.
 * If no port is specified when using TCP transport, the default port 42100 is used.
 * To set more than one *server*'s address, they must be separated by semicolons.
-* The server's ID is determined by their position in the list.
-  Two semicolons together means the corresponding ID is free.
 * When using IPv6 with DNS, the specified domain name space (*<dns>*) must be able to resolve to an IPv6
   address. Otherwise an error will be raised.
 
 The following example shows how to set the address of two remote discovery servers with addresses
-'84.22.259.329:8888' and 'localhost:1234' and IDs 0 and 2 respectively.
+'84.22.259.329:8888' and 'localhost:1234'.
 
     +----------------------------------------------------------------------------+
     | **Linux**                                                                  |
     +----------------------------------------------------------------------------+
     | .. code-block:: bash                                                       |
     |                                                                            |
-    |    export ROS_DISCOVERY_SERVER="84.22.259.329:8888;;localhost:1234"        |
+    |    export ROS_DISCOVERY_SERVER="84.22.259.329:8888;localhost:1234"         |
     +----------------------------------------------------------------------------+
     | **Windows**                                                                |
     +----------------------------------------------------------------------------+
     | .. code-block:: bash                                                       |
     |                                                                            |
-    |    set ROS_DISCOVERY_SERVER=84.22.259.329:8888;;localhost:1234             |
+    |    set ROS_DISCOVERY_SERVER=84.22.259.329:8888;localhost:1234              |
     +----------------------------------------------------------------------------+
 
 .. important::
     IP addresses specified in ``ROS_DISCOVERY_SERVER`` must be either valid IPv4/IPv6 addresses or domain names.
     If a name can be resolved into several addresses, it is possible to either use them all or restrict the selection to
-    the first IPv4 using the `UDPv4:` or `TCPv4` prefixes or to the first IPv6 address using the `UDPv6:` or `TCPv6`
+    the first IPv4 using the `UDPv4` or `TCPv4` prefixes or to the first IPv6 address using the `UDPv6` or `TCPv6`
     prefixes.
 
-.. important::
-    This environment variable is meant to be used in combination with :ref:`Fast DDS discovery CLI<cli_discovery>`.
-    The *server*'s ID is used by *Fast DDS* to derived the |GuidPrefix_t-api| of the *server*.
-    If the *server* is not instantiated using the CLI, the *server*'s GUID prefix should adhere to the same schema
-    as the one generated from the CLI.
-    Else, the *clients* configured with this environment variable will not be able to establish a connection with
-    the *server*, thus not being able to connect to other *clients* either.
-    The *server*'s GUID prefixes generated by the CLI comply with the following schema:
-    ``44.53.<server-id-in-hex>.5f.45.50.52.4f.53.49.4d.41``.
-    This prefix schema has been chosen for its ASCII translation: ``DS<id_in_hex>_EPROSIMA``.
-
 .. important::
     This environment variable can be changed at runtime adding new remote servers to a |SERVER|, |BACKUP| or |CLIENT|
     (that has been initialized with this environment variable previously) if loaded from an environment file using