Remove unnecessary empty dtors from the widgets sample

No real changes, just remove completely unnecessary lines and trailing
semicolons after them.

samples/widgets/button.cpp

@@ -89,7 +89,6 @@ class ButtonWidgetsPage : public WidgetsPage
 {
 public:
     ButtonWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~ButtonWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_button; }
     virtual void RecreateWidget() wxOVERRIDE { CreateButton(); }

samples/widgets/checkbox.cpp

@@ -73,7 +73,6 @@ class CheckBoxWidgetsPage : public WidgetsPage
 {
 public:
     CheckBoxWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~CheckBoxWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_checkbox; }
     virtual void RecreateWidget() wxOVERRIDE { CreateCheckbox(); }

samples/widgets/clrpicker.cpp

@@ -63,7 +63,6 @@ class ColourPickerWidgetsPage : public WidgetsPage
 {
 public:
     ColourPickerWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~ColourPickerWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_clrPicker; }
     virtual void RecreateWidget() wxOVERRIDE { RecreatePicker(); }

samples/widgets/datepick.cpp

@@ -68,7 +68,6 @@ class DatePickerWidgetsPage : public WidgetsPage
 {
 public:
     DatePickerWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~DatePickerWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_datePicker; }
     virtual void RecreateWidget() wxOVERRIDE { CreateDatePicker(); }

samples/widgets/dirpicker.cpp

@@ -65,7 +65,6 @@ class DirPickerWidgetsPage : public WidgetsPage
 {
 public:
     DirPickerWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~DirPickerWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_dirPicker; }
     virtual void RecreateWidget() wxOVERRIDE { RecreatePicker(); }

samples/widgets/filepicker.cpp

@@ -72,7 +72,6 @@ class FilePickerWidgetsPage : public WidgetsPage
 {
 public:
     FilePickerWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~FilePickerWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_filePicker; }
     virtual void RecreateWidget() wxOVERRIDE { RecreatePicker(); }

samples/widgets/fontpicker.cpp

@@ -63,7 +63,6 @@ class FontPickerWidgetsPage : public WidgetsPage
 {
 public:
     FontPickerWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~FontPickerWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_fontPicker; }
     virtual void RecreateWidget() wxOVERRIDE { RecreatePicker(); }

samples/widgets/radiobox.cpp

@@ -83,7 +83,6 @@ class RadioWidgetsPage : public WidgetsPage
 {
 public:
     RadioWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~RadioWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_radio; }
     virtual void RecreateWidget() wxOVERRIDE { CreateRadio(); }

samples/widgets/slider.cpp

@@ -94,7 +94,6 @@ class SliderWidgetsPage : public WidgetsPage
 {
 public:
     SliderWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~SliderWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_slider; }
     virtual void RecreateWidget() wxOVERRIDE { CreateSlider(); }

samples/widgets/spinbtn.cpp

@@ -84,7 +84,6 @@ class SpinBtnWidgetsPage : public WidgetsPage
 {
 public:
     SpinBtnWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~SpinBtnWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_spinbtn; }
     virtual Widgets GetWidgets() const wxOVERRIDE

samples/widgets/static.cpp

@@ -91,7 +91,6 @@ class StaticWidgetsPage : public WidgetsPage
 {
 public:
     StaticWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~StaticWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_statText; }
     virtual Widgets GetWidgets() const wxOVERRIDE

samples/widgets/textctrl.cpp

@@ -151,7 +151,6 @@ class TextWidgetsPage : public WidgetsPage
 public:
     // ctor(s) and dtor
     TextWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~TextWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_text; }
     virtual wxTextEntryBase *GetTextEntry() const wxOVERRIDE { return m_text; }

samples/widgets/timepick.cpp

@@ -64,7 +64,6 @@ class TimePickerWidgetsPage : public WidgetsPage
 {
 public:
     TimePickerWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~TimePickerWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_timePicker; }
     virtual void RecreateWidget() wxOVERRIDE { CreateTimePicker(); }

samples/widgets/toggle.cpp

@@ -87,7 +87,6 @@ class ToggleWidgetsPage : public WidgetsPage
 {
 public:
     ToggleWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
-    virtual ~ToggleWidgetsPage(){};
 
     virtual wxWindow *GetWidget() const wxOVERRIDE { return m_toggle; }
     virtual void RecreateWidget() wxOVERRIDE { CreateToggle(); }