Remove ssl_cert_test sample app

Remove the ssl_cert_test sample application, as it uses
hardcoded certificates that moved, and is redundant with the x509
tests and applications. Fixes #1905.
diff --git a/programs/Makefile b/programs/Makefile
index 7d9affc..28c747b 100644
--- a/programs/Makefile
+++ b/programs/Makefile
@@ -67,7 +67,7 @@
 	ssl/ssl_mail_client$(EXEXT)	random/gen_entropy$(EXEXT)	\
 	random/gen_random_havege$(EXEXT)				\
 	random/gen_random_ctr_drbg$(EXEXT)				\
-	test/ssl_cert_test$(EXEXT)	test/benchmark$(EXEXT)		\
+	test/benchmark$(EXEXT)                          		\
 	test/selftest$(EXEXT)		test/udp_proxy$(EXEXT)		\
 	test/zeroize$(EXEXT)						\
 	test/query_compile_time_config$(EXEXT)				\
@@ -241,10 +241,6 @@
 	echo "  CC    ssl/mini_client.c"
 	$(CC) $(LOCAL_CFLAGS) $(CFLAGS) ssl/mini_client.c   $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
 
-test/ssl_cert_test$(EXEXT): test/ssl_cert_test.c $(DEP)
-	echo "  CC    test/ssl_cert_test.c"
-	$(CC) $(LOCAL_CFLAGS) $(CFLAGS) test/ssl_cert_test.c   $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@
-
 test/benchmark$(EXEXT): test/benchmark.c $(DEP)
 	echo "  CC    test/benchmark.c"
 	$(CC) $(LOCAL_CFLAGS) $(CFLAGS) test/benchmark.c   $(LOCAL_LDFLAGS) $(LDFLAGS) -o $@