BareMetal: Avoid use of otherwise unneeded requestRemoteSetup() signal

Note that this changes the startup timing in the StartupOnNetwork
case slightly, as the application launch is now triggered in
parallel with the gdb launch.

Change-Id: Iaa0b60b8c478eb47abb6e93fbd3b326e0acdd13b
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/debugger/debuggerruncontrol.h

@@ -84,12 +84,10 @@ public:
     bool isQmlDebugging() const { return m_isQmlDebugging; }
     int portsUsedByDebugger() const;
 
-    virtual void doRemoteSetup() { emit requestRemoteSetup(); }
     void appendSolibSearchPath(const QString &str);
 
 signals:
     void aboutToNotifyInferiorSetupOk();
-    void requestRemoteSetup();
 
 private:
     Internal::DebuggerEngine *m_engine = nullptr; // Master engine