Test: Remove unused variable

Remove unused variable handle.

Signed-off-by: Summer Qin <summer.qin@arm.com>
Change-Id: I0145df722c8a2747e3b8d22ad697bb95c3be9e17
diff --git a/test/suites/ipc/secure/ipc_s_interface_testsuite.c b/test/suites/ipc/secure/ipc_s_interface_testsuite.c
index 3476084..08c6bc0 100644
--- a/test/suites/ipc/secure/ipc_s_interface_testsuite.c
+++ b/test/suites/ipc/secure/ipc_s_interface_testsuite.c
@@ -41,7 +41,6 @@
 static void tfm_ipc_test_1001(struct test_result_t *ret)
 {
     uint32_t data = 0xFFFFABCD;
-    psa_handle_t handle;
     psa_status_t status;
     psa_invec in_vec[] = { {&data, sizeof(uint32_t)} };