tests: tls_configurations: remove tests on native/64 platform

Since the same test might be run in parallel on different platforms,
the one that it's started later will fail due to port re-use for
the OpenSSL server.
Since it's not really required to run the tests on native_sim and
native_sim/native/64, the latter is removed in order to solve this
problem.

Signed-off-by: Valerio Setti <[email protected]>

Author: valeriosetti

tests/net/socket/tls_configurations/testcase.yaml

@@ -4,7 +4,6 @@ common:
     - net.socket
   platform_allow:
     - native_sim
-    - native_sim/native/64
   integration_platforms:
     - native_sim
   harness: pytest