tests/qtest: remove return after g_assert_not_reached()

This patch is part of a series that moves towards a consistent use of
g_assert_not_reached() rather than an ad hoc mix of different
assertion mechanisms.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Message-ID: <20240919044641.386068-34-pierrick.bouvier@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>

tests/qtest/acpi-utils.c

@@ -156,5 +156,4 @@ uint64_t acpi_find_rsdp_address_uefi(QTestState *qts, uint64_t start,
         g_usleep(TEST_DELAY);
     }
     g_assert_not_reached();
-    return 0;
 }