fix(iotdb): remove root `request_timeout` option

Fixes https://emqx.atlassian.net/browse/EMQX-10175

Since IoTDB bridge is not used as an authn/authz source and reuses the
webhook connector, we should have only one request timeout field (the
`resource_opts.request_ttl` one) like the webhook bridge does, to
avoid confusion and potentially bad configuration combinations.

apps/emqx_bridge_iotdb/src/emqx_bridge_iotdb.erl

@@ -141,14 +141,6 @@ request_config() ->
                     default => 2,
                     desc => ?DESC("config_max_retries")
                 }
-            )},
-        {request_timeout,
-            mk(
-                emqx_schema:timeout_duration_ms(),
-                #{
-                    default => <<"15s">>,
-                    desc => ?DESC("config_request_timeout")
-                }
             )}
     ].
 

rel/i18n/emqx_bridge_iotdb.hocon

@@ -59,12 +59,6 @@ config_max_retries.desc:
 config_max_retries.label:
 """HTTP Request Max Retries"""
 
-config_request_timeout.desc:
-"""HTTP request timeout."""
-
-config_request_timeout.label:
-"""HTTP Request Timeout"""
-
 desc_config.desc:
 """Configuration for Apache IoTDB bridge."""