Vcs: Provide default implementations for some pure methods

Saves empty re-implementations in some cases.

Change-Id: I4ffa039d70257f2256942e09fcabe790943e1578
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/subversion/subversionclient.cpp

@@ -325,24 +325,6 @@ void SubversionClient::describe(const QString &workingDirectory, int changeNumbe
     controller->requestReload();
 }
 
-QString SubversionClient::findTopLevelForFile(const QFileInfo &file) const
-{
-    Q_UNUSED(file)
-    return QString();
-}
-
-QStringList SubversionClient::revisionSpec(const QString &revision) const
-{
-    Q_UNUSED(revision)
-    return QStringList();
-}
-
-VcsBaseClient::StatusItem SubversionClient::parseStatusLine(const QString &line) const
-{
-    Q_UNUSED(line)
-    return VcsBaseClient::StatusItem();
-}
-
 } // namespace Internal
 } // namespace Subversion