mainview: fix crash when call is declined or hanged up

deleted unused calls to getCallId with empty id's

Gitlab: #30, #33
Change-Id: Id26b883907c6dd1e03ac9c12e7ebf8a8c8c2711b

src/mainview/MainView.qml

@@ -170,10 +170,6 @@ Window {
 
         function onCloseCallStack(accountId, convUid) {
 
-            var responsibleCallId = ClientWrapper.utilsAdaptor.getCallId(
-                    callStackView.responsibleAccountId, callStackView.responsibleConvUid)
-            var callId = ClientWrapper.utilsAdaptor.getCallId(
-                    callStackView.responsibleAccountId, convUid)
             /*
              * Check if call stack view is on any of the stackview.
              */