Remove the check in ssl-opt.sh for MAX_INTERMEDIATE_CA

The check uses grep, not config.pl, on the x509 headers - not where it should
be configured - config.h. grep syntax isn't very portable. Without config.pl
it's quite hard to do this check properly so removing this check.

tests/ssl-opt.sh

@@ -1948,23 +1948,6 @@ run_test    "Authentication: client no cert, ssl3" \
             -C "! mbedtls_ssl_handshake returned" \
             -S "X509 - Certificate verification failed"
 
-# The "max_int chain" tests assume that MAX_INTERMEDIATE_CA is set to its
-# default value (8)
-
-MAX_IM_CA=8
-MAX_IM_CA_REGEX="#define[[:blank:]]\+MBEDTLS_X509_MAX_INTERMEDIATE_CA"
-MAX_IM_CA_REGEX="${MAX_IM_CA_REGEX}[[:blank:]]\+${MAX_IM_CA}[[:blank:]]*$"
-
-if grep "${MAX_IM_CA_REGEX}" ../include/mbedtls/x509.h > /dev/null;
-then :;
-else
-    echo "$(echo 'The tests for long intermediate chains assume the value'  \
-                  ${MAX_IM_CA} 'for MBEDTLS_X509_MAX_INTERMEDIATE_CA.'      \
-                 'To test other values, please manually adapt the max_int'  \
-                 'tests in ssl-opt.sh.')"
-    return
-fi
-
 run_test    "Authentication: server max_int chain, client default" \
             "$P_SRV crt_file=data_files/dir-maxpath/c09.pem \
                     key_file=data_files/dir-maxpath/09.key" \