CMake: Simplify BuildDirParameters

Remove some useless bool, Creator would crash if that was ever set.

Change-Id: I148cad6b6139332a6010698f075b584c87dec338
Reviewed-by: hjk <hjk@qt.io>

src/plugins/cmakeprojectmanager/builddirparameters.h

@@ -49,7 +49,6 @@ public:
     bool isValid() const;
     CMakeTool *cmakeTool() const;
 
-    bool initialized = false;
     QString projectName;
 
     Utils::FilePath sourceDirectory;