transactions: do not execute when simgrid is enabled

examples/Makefile.am

 # StarPU --- Runtime system for heterogeneous multicore architectures.
 #
-# Copyright (C) 2009-2021  Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria
+# Copyright (C) 2009-2022  Université de Bordeaux, CNRS (LaBRI UMR 5800), Inria
 # Copyright (C) 2011       Télécom-SudParis
 # Copyright (C) 2016       Uppsala University
 # Copyright (C) 2017       Erwan Leria
@@ -362,8 +362,7 @@ STARPU_EXAMPLES +=				\
 	cholesky/cholesky_tag			\
 	cholesky/cholesky_tile_tag		\
 	cholesky/cholesky_implicit		\
-	cholesky/cholesky_compil		\
-	transactions/trs_sgemm
+	cholesky/cholesky_compil
 
 if !STARPU_SIMGRID
 STARPU_EXAMPLES +=				\
@@ -371,7 +370,9 @@ STARPU_EXAMPLES +=				\
 	cholesky/cholesky_grain_tag		\
 	heat/heat				\
 	cg/cg					\
-	pipeline/pipeline
+	pipeline/pipeline			\
+	transactions/trs_sgemm
+
 
 if !STARPU_USE_MPI_MASTER_SLAVE
 SHELL_TESTS += \