loplugin:unodispose in binaryurp

Change-Id: Iab83b304ab7928dc4ca88a90f3184e2b2e7bf741
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/156842
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

binaryurp/source/bridge.cxx

@@ -920,6 +920,8 @@ void Bridge::dispose() {
     // from within an incoming or outgoing remote call, as passive_.wait() would
     // otherwise deadlock:
     passive_.wait();
+    connection_.clear();
+    provider_.clear();
 }
 
 void Bridge::addEventListener(