samples/net: Don't test on native_posix

native_posix is now deprecated.
Building these samples in both native_sim and native_posix
does not improve coverage for these samples but doubles CI time.
As anyhow native_posix will be removed all together in
2 releases, let's remove it already for this sample.

Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>

samples/net/gptp/boards/native_posix.conf

@@ -1,8 +0,0 @@
-# Settings for native_posix ethernet driver
-CONFIG_ETH_NATIVE_POSIX_PTP_CLOCK=y
-
-#CONFIG_ETH_NATIVE_POSIX_RANDOM_MAC=y
-CONFIG_ETH_NATIVE_POSIX_MAC_ADDR="00:00:5e:00:53:2a"
-
-# Assume 1 ms accuracy for native_posix simulated clock
-CONFIG_NET_GPTP_CLOCK_ACCURACY_1MS=y

samples/net/gptp/sample.yaml

@@ -11,8 +11,6 @@ tests:
     platform_allow:
       - frdm_k64f
       - sam_e70_xplained/same70q21
-      - native_posix
-      - native_posix/native/64
       - native_sim
       - native_sim/native/64
       - nucleo_f767zi

samples/net/ipv4_autoconf/sample.yaml

@@ -5,8 +5,6 @@ common:
     - ipv4_autoconf
   platform_allow:
     - qemu_x86
-    - native_posix
-    - native_posix/native/64
     - native_sim
     - native_sim/native/64
   integration_platforms:

samples/net/lldp/sample.yaml

@@ -9,8 +9,6 @@ sample:
 tests:
   sample.net.lldp:
     platform_allow:
-      - native_posix
-      - native_posix/native/64
       - native_sim
       - native_sim/native/64
     integration_platforms: