Remove the double definition of opal_output_stream_t_class.

This commit was SVN r11455.

opal/util/output.h

@@ -482,15 +482,5 @@ OPAL_DECLSPEC OBJ_CLASS_DECLARATION(opal_output_stream_t);
 }
 #endif
 
-/**
- * Declare the class of this type.  Note that the constructor for
- * this class is for convenience only -- it is \em not necessary
- * to be invoked.  If the constructor it used, it sets all values
- * in the struct to be false / 0 (i.e., turning off all output).
- * The intended usage is to invoke the constructor and then enable
- * the output fields that you want.
- */
-OBJ_CLASS_DECLARATION(opal_output_stream_t);
-
 #endif /* OPAL_OUTPUT_H_ */