cosmetic: gsm0808_test: drop extraneous assertion

Recent commit I77cd4b9142510c6914298b720d9c19ab68f9ebef left an obsolete
assertion around. It is already done in the if-body now.

Change-Id: I1bb2ea363e8a9d86b24338df3584abc93ebc6dd4
diff --git a/tests/gsm0808/gsm0808_test.c b/tests/gsm0808/gsm0808_test.c
index 4bf61e7..9730be2 100644
--- a/tests/gsm0808/gsm0808_test.c
+++ b/tests/gsm0808/gsm0808_test.c
@@ -1045,7 +1045,6 @@
 		printf("expect: %s\n", osmo_hexdump(cil_enc_expected, sizeof(cil_enc_expected)));
 		OSMO_ASSERT(false);
 	}
-	OSMO_ASSERT(memcmp(cil_enc_expected, msg->data, msg->len) == 0);
 
 	rc_dec = gsm0808_dec_cell_id_list2(&dec_cil, msg->data + 2, msg->len - 2);
 	OSMO_ASSERT(rc_dec == msg->len - 2);