ProjectExplorer: Hide build page for projects that do not build

Change-Id: I56feaab67690b5ece7379a9c1f676392230de107
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/pythoneditor/pythoneditorplugin.cpp

@@ -98,6 +98,7 @@ public:
     void refresh(Target *target = nullptr);
 
     bool needsConfiguration() const final { return false; }
+    bool needsBuildConfigurations() const final { return false; }
 
 private:
     RestoreResult fromMap(const QVariantMap &map, QString *errorMessage) override;