samples: net: sockets: echo_service: Use ZVFS default settings

This sample works without increasing ZVFS_OPEN_MAX and ZVFS_POLL_MAX to
some arbitrary number. This also removes a duplicate entry for
ZVFS_OPEN_MAX.

ZVFS_OPEN_MAX already defaults to a reasonably large value of 16 if
POSIX_API is enabled, which is the case for the echo_service sample.

Signed-off-by: Marc Lasch <[email protected]>

Author: mlasch

samples/net/sockets/echo_service/prj.conf

@@ -10,11 +10,8 @@ CONFIG_NET_IPV6=y
 CONFIG_NET_TCP=y
 CONFIG_NET_SOCKETS=y
 CONFIG_NET_IPV4_MAPPING_TO_IPV6=y
-CONFIG_ZVFS_OPEN_MAX=10
 CONFIG_NET_MAX_CONN=5
 CONFIG_NET_SOCKETS_SERVICE=y
-CONFIG_ZVFS_OPEN_MAX=20
-CONFIG_ZVFS_POLL_MAX=20
 
 # Network driver config
 CONFIG_TEST_RANDOM_GENERATOR=y