Remove operator overload in UpdateType

Documentation/DeveloperHelpSources/building.docu

@@ -9,7 +9,7 @@ OpenFlipper.
 
 \section reqlibs Required libraries
 <ul>
-<li> 5.9 <= Qt <= 5.13  ( http://www.qt.io/download/ ) Use the OpenGL version. If you install Qt, please make sure that QtScript is also installed.</li>
+<li> 5.11 <= Qt <= 5.13  ( http://www.qt.io/download/ ) Use the OpenGL version. If you install Qt, please make sure that QtScript is also installed.</li>
 </ul>
 
 \section optlibs Optional libraries ( Without these libraries some functionality might not be available) 

common/UpdateType.hh

@@ -78,10 +78,10 @@ class DLLEXPORT UpdateType {
     /// Check if this update contains the given UpdateType
     bool contains( const UpdateType& _type ) const;
     
-    friend std::ostream &operator<< (
-            std::ostream &os, const UpdateType &type) {
-        return os << type.type_;
-    }
+//    friend std::ostream &operator<< (
+//            std::ostream &os, const UpdateType &type) {
+//        return os << type.type_;
+//    }
 
   private:
     UpdateTypeSet type_;