Remove redundant check in all.sh

test -s can't fail if the subsequent grep succeeds.
diff --git a/tests/scripts/all.sh b/tests/scripts/all.sh
index af788cf..326cfc0 100755
--- a/tests/scripts/all.sh
+++ b/tests/scripts/all.sh
@@ -1063,7 +1063,6 @@
         cleanup
         make programs CC="$compiler" DEBUG=1 CFLAGS="$optimization_flag"
         if_build_succeeded gdb -x tests/scripts/test_zeroize.gdb -nw -batch -nx 2>&1 | tee test_zeroize.log
-        if_build_succeeded [ -s test_zeroize.log ]
         if_build_succeeded grep "The buffer was correctly zeroized" test_zeroize.log
         if_build_succeeded not grep -i "error" test_zeroize.log
         rm -f test_zeroize.log