CI: cirrus-ci: remove reg-tests/checks/tcp-check-ssl.vtc on CentOS 6

reg-tests/checks/tcp-check-ssl.vtc requires ALPN which is not
available on CentOS 6
diff --git a/.cirrus.yml b/.cirrus.yml
index 2d26952..07e1bb2 100644
--- a/.cirrus.yml
+++ b/.cirrus.yml
@@ -26,6 +26,6 @@
     - make CC=cc V=1 TARGET=linux-glibc-legacy USE_ZLIB=1 USE_PCRE=1 USE_OPENSSL=1
     - ./haproxy -vv
     - ldd haproxy
-    # remove alpn reg-test (CentOS 6 does not support alpn)
-    - rm reg-tests/connection/proxy_protocol_random_fail.vtc
+    # remove some reg-tests (CentOS 6 does not support alpn)
+    - rm reg-tests/connection/proxy_protocol_random_fail.vtc reg-tests/checks/tcp-check-ssl.vtc
     - env VTEST_PROGRAM=../vtest/vtest make reg-tests || (for folder in /tmp/*regtest*/vtc.*; do cat $folder/INFO $folder/LOG; done && exit 1)