VCS: Remove redundant calls to default constructor

Change-Id: I4521e26e72c85e896e58e4d9d129f92b2d80f869
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/bazaar/bazaarplugin.cpp

@@ -112,8 +112,7 @@ static const VcsBase::VcsBaseSubmitEditorParameters submitEditorParameters = {
 BazaarPlugin *BazaarPlugin::m_instance = 0;
 
 BazaarPlugin::BazaarPlugin()
-    : VcsBase::VcsBasePlugin(),
-      m_optionsPage(0),
+    : m_optionsPage(0),
       m_client(0),
       m_commandLocator(0),
       m_addAction(0),

src/plugins/cvs/cvsplugin.cpp

@@ -162,7 +162,6 @@ static inline bool messageBoxQuestion(const QString &title, const QString &quest
 CvsPlugin *CvsPlugin::m_cvsPluginInstance = 0;
 
 CvsPlugin::CvsPlugin() :
-    VcsBasePlugin(),
     m_commandLocator(0),
     m_addAction(0),
     m_deleteAction(0),

src/plugins/git/gitplugin.cpp

@@ -125,7 +125,6 @@ using namespace Git::Internal;
 GitPlugin *GitPlugin::m_instance = 0;
 
 GitPlugin::GitPlugin() :
-    VcsBase::VcsBasePlugin(),
     m_commandLocator(0),
     m_submitCurrentAction(0),
     m_diffSelectedFilesAction(0),

src/plugins/mercurial/mercurialplugin.cpp

@@ -115,7 +115,6 @@ static const VcsBaseSubmitEditorParameters submitEditorParameters = {
 MercurialPlugin *MercurialPlugin::m_instance = 0;
 
 MercurialPlugin::MercurialPlugin() :
-    VcsBasePlugin(),
         optionsPage(0),
         m_client(0),
         core(0),

src/plugins/perforce/perforceplugin.cpp

@@ -176,7 +176,6 @@ PerforceResponse::PerforceResponse() :
 PerforcePlugin *PerforcePlugin::m_perforcePluginInstance = NULL;
 
 PerforcePlugin::PerforcePlugin() :
-    VcsBase::VcsBasePlugin(),
     m_commandLocator(0),
     m_editAction(0),
     m_addAction(0),

src/plugins/subversion/subversionplugin.cpp

@@ -186,7 +186,6 @@ static inline QStringList svnDirectories()
 SubversionPlugin *SubversionPlugin::m_subversionPluginInstance = 0;
 
 SubversionPlugin::SubversionPlugin() :
-    VcsBase::VcsBasePlugin(),
     m_svnDirectories(svnDirectories()),
     m_commandLocator(0),
     m_addAction(0),