Removed instanceOf.

I think it's time to remove MOST of the poor man's RTTI now.

lout/identity.hh

@@ -136,20 +136,6 @@ public:
     *    registered.
     */
    const char *getClassName() { return classesById.at( classId )->className; }
-
-   template< typename T >
-   [[deprecated]]
-   inline bool
-   instanceOf()
-   {
-      const bool expected= dynamic_cast< T * >( this );
-      const bool witness= instanceOf_impl( T::CLASS_ID );
-      if( witness != expected ) throw std::logic_error{ "RTTI based `instanceOf` disagrees with Dillo's lout:: impl." };
-	  return expected;
-   }
-
-  private:
-   bool instanceOf_impl (std::intptr_t otherClassId);
 };
 
 } // namespace identity