Vcs: Move settings ownership from VcsBaseClientImpl to plugin

Turns out CVS and Bazaar already had an unused copy there...

Change-Id: I512c4d6322620e2b55d9008600ac676ce09032aa
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

src/plugins/vcsbase/vcsbaseclient.h

@@ -60,7 +60,7 @@ class VCSBASE_EXPORT VcsBaseClientImpl : public QObject
 
 public:
     explicit VcsBaseClientImpl(VcsBaseClientSettings *settings);
-    ~VcsBaseClientImpl() override;
+    ~VcsBaseClientImpl() override = default;
 
     VcsBaseClientSettings &settings() const;