removed embedded broker (#8649)

Also-by: Wouter Born <github@maindrain.net>
Signed-off-by: Kai Kreuzer <kai@openhab.org>

bundles/pom.xml

@@ -21,7 +21,6 @@
     <module>org.openhab.io.homekit</module>
     <module>org.openhab.io.hueemulation</module>
     <module>org.openhab.io.imperihome</module>
-    <module>org.openhab.io.mqttembeddedbroker</module>
     <module>org.openhab.io.neeo</module>
     <module>org.openhab.io.openhabcloud</module>
     <module>org.openhab.io.transport.modbus</module>