CMake: Slim down BuildDirManager's interface

* Make parse() private

Change-Id: I587f72296e4520ed62db06b7d46987907975eb2d
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

src/plugins/cmakeprojectmanager/builddirmanager.h

@@ -72,7 +72,6 @@ public:
 
     bool isParsing() const;
 
-    void parse();
     void clearCache();
     void forceReparse();
     void maybeForceReparse(); // Only reparse if the configuration has changed...
@@ -107,6 +106,8 @@ protected:
     const CMakeConfig intendedConfiguration() const;
 
 private:
+    void parse();
+
     void cmakeFilesChanged();
 
     void stopProcess();