Remove some unnecessary toolbar related declarations, fix comments

src/toolbars/ControlToolBar.cpp

@@ -20,9 +20,7 @@
   This class, which is a child of Toolbar, creates the
   window containing the Transport (rewind/play/stop/record/ff)
   buttons. The window can be embedded within a
-  normal project window, or within a ToolbarFrame that is
-  managed by a global ToolBarStub called
-  gControlToolBarStub.
+  normal project window, or within a ToolBarFrame.
 
   All of the controls in this window were custom-written for
   Audacity - they are not native controls on any platform -
@@ -59,7 +57,6 @@
 #include <wx/datetime.h>
 
 #include "TranscriptionToolBar.h"
-#include "MeterToolBar.h"
 
 #include "../AColor.h"
 #include "../AdornedRulerPanel.h"

src/toolbars/EditToolBar.cpp

@@ -19,8 +19,7 @@
   window containing interfaces to commonly-used edit
   functions that are otherwise only available through
   menus. The window can be embedded within a normal project
-  window, or within a ToolbarFrame that is managed by a
-  global ToolBarStub called gControlToolBarStub.
+  window, or within a ToolBarFrame.
 
   All of the controls in this window were custom-written for
   Audacity - they are not native controls on any platform -

src/toolbars/ToolsToolBar.cpp

@@ -18,9 +18,7 @@
   This class, which is a child of Toolbar, creates the
   window containing the tool selection (ibeam, envelope,
   move, zoom). The window can be embedded within a
-  normal project window, or within a ToolbarFrame that is
-  managed by a global ToolBarStub called
-  gToolsToolBarStub.
+  normal project window, or within a ToolBarFrame.
 
   All of the controls in this window were custom-written for
   Audacity - they are not native controls on any platform -
@@ -48,8 +46,6 @@
 #endif
 #include <wx/tooltip.h>
 
-#include "MeterToolBar.h"
-
 #include "../Prefs.h"
 #include "../AllThemeResources.h"
 #include "../ImageManipulation.h"