doc: re-commit #12001: fix TODO position

doc/doxygen/chapters/12online_performance_tools.doxy

@@ -424,9 +424,4 @@ task, and each color corresponds to a codelet.
 \image html data_trace.png
 \image latex data_trace.eps "" width=\textwidth
 
-// TODO: data transfer stats are similar to the ones displayed when
-// setting STARPU_BUS_STATS
-
-
-
 */

doc/doxygen/chapters/13offline_performance_tools.doxy

@@ -477,4 +477,7 @@ Computation took (in ms)
 Synthetic GFlops : 44.21
 \endverbatim
 
+// TODO: data transfer stats are similar to the ones displayed when
+// setting STARPU_BUS_STATS
+
 */