test_nptl: fix expected result for tst-cputimer[123]

Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

test/nptl/Makefile.in

@@ -221,8 +221,4 @@ OPTS_tst-cancel7 = --command ./tst-cancel7
 OPTS_tst-mqueue7 = -- ./tst-mqueue7
 OPTS_tst-exec4 = ./tst-exec4
 
-RET_tst-cputimer1 := 1
-RET_tst-cputimer2 := 1
-RET_tst-cputimer3 := 1
-
 WRAPPER := env LD_LIBRARY_PATH="$$PWD:.:$(LD_LIBRARY_PATH)" TIMEOUTFACTOR=100