repro steps:
1. create new device:
http://172.21.174.183:8181/restconf/config/opendaylight-inventory:nodes/node/controller-config/yang-ext:mount/config:modules

<module xmlns="urn:opendaylight:params:xml:ns:yang:controller:config">
<type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">prefix:sal-netconf-connector</type>
<name>controller-config_xrvr</name>
<address xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">10.25.2.37</address>
<port xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">830</port>
<username xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">cisco</username>
<password xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">cisco</password>
<tcp-only xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">false</tcp-only>
<event-executor xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
<type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:netty">prefix:netty-event-executor</type>
<name>global-event-executor</name>
</event-executor>
<binding-registry xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
<type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:binding">prefix:binding-broker-osgi-registry</type>
<name>binding-osgi-broker</name>
</binding-registry>
<dom-registry xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
<type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:md:sal:dom">prefix:dom-broker-osgi-registry</type>
<name>dom-broker</name>
</dom-registry>
<client-dispatcher xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
<type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:config:netconf">prefix:netconf-client-dispatcher</type>
<name>global-netconf-dispatcher</name>
</client-dispatcher>
<processing-executor xmlns="urn:opendaylight:params:xml:ns:yang:controller:md:sal:connector:netconf">
<type xmlns:prefix="urn:opendaylight:params:xml:ns:yang:controller:threadpool">prefix:threadpool</type>
<name>global-netconf-processing-executor</name>
</processing-executor>
</module>

2. delete it
http://172.21.174.183:8181/restconf/config/opendaylight-inventory:nodes/node/controller-config/yang-ext:mount/config:modules/module/odl-sal-netconf-connector-cfg:sal-netconf-connector/controller-config_xrvr

3. check it using opendaylight-inventory path:
http://172.21.174.183:8181/restconf/config/opendaylight-inventory:nodes/
-device is not present

4. check it using topology path:
http://172.21.174.183:8181/restconf/config/network-topology:network-topology/topology/topology-netconf/
-device is there:
<topology
xmlns="urn:TBD:params:xml:ns:yang:network-topology">
<topology-id>topology-netconf</topology-id>
<node>
<node-id>ncs-controller-config</node-id>
</node>
<node>
<node-id>controller-config</node-id>
</node>
<node>
<node-id>controller-config_xrvr</node-id>
</node>
</topology>