IWizard and derived classes: Code cleanups

There should be no functional changes, just removal of unnecessary
code. This includes:

* Removal of unused QObject *parent = 0 parameters to constructors
* Removal of unnecessary explicits
* Removal of unnecessary virtuals
* Removal of unnecessary constructors/destructors

Some explicits were added though where those were missing.

Change-Id: Iab570349ea950dad0a2d01af17bc6175f70832f1
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/pythoneditor/wizard/pythonfilewizard.cpp

@@ -55,10 +55,6 @@ FileWizard::FileWizard()
     setDescription(FileWizard::tr(Constants::EN_PY_SOURCE_DESCRIPTION));
 }
 
-FileWizard::~FileWizard()
-{
-}
-
 /**
  * @brief FileWizard::createWizardDialog
  * @param parent

src/plugins/pythoneditor/wizard/pythonfilewizard.h

@@ -40,14 +40,12 @@ class FileWizard : public Core::BaseFileWizard
 
 public:
     FileWizard();
-    ~FileWizard();
 
 protected:
     QWizard *createWizardDialog(QWidget *parent,
             const Core::WizardDialogParameters &params) const;
 
-    Core::GeneratedFiles generateFiles( const QWizard *dialog,
-            QString *errorMessage) const;
+    Core::GeneratedFiles generateFiles( const QWizard *dialog, QString *errorMessage) const;
 };
 
 } // namespace PythonEditor