test: Remove ASN1 library test

With MBEDTLS_LIB_X509 enabled, we don't build the original ASN1 lib,
So remove it from test.

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
1 file changed