Debugger: Cosmetics

Remove one unused function declaration and adjust one comment
to reality.

Change-Id: I0ba88dfa89d1fe312cef97a659715c664f4650bc
Reviewed-by: Christian Stenger <christian.stenger@theqtcompany.com>

src/plugins/debugger/debuggertooltipmanager.cpp

@@ -637,7 +637,6 @@ public:
     void releaseEngine();
 
     void saveSessionData(QXmlStreamWriter &w) const;
-    void handleStackFrameCompleted(const QString &frameFile, const QString &frameFunction);
 
     void positionShow(const TextEditorWidget *editorWidget);
 

src/plugins/debugger/memoryagent.cpp

@@ -75,7 +75,8 @@ namespace Internal {
        (m_view).
     \endlist
 
-    Views are updated on the  DebuggerEngine::stackFrameCompleted signal.
+    Views are asked to update themselves directly by the owning
+    DebuggerEngine.
     An exception are views of class Debugger::RegisterMemoryView tracking the
     content pointed to by a register (eg stack pointer, instruction pointer).
     They are connected to the set/changed signals of