nsim: remove nsi_host_getenv.c/h now that in-tree support replaces it

Signed-off-by: Mike Szczys <mike@golioth.io>

Author: szczys

examples/zephyr/common/CMakeLists.txt

@@ -29,7 +29,3 @@ if(CONFIG_GOLIOTH_SAMPLE_HARDCODED_CREDENTIALS AND CONFIG_GOLIOTH_SAMPLE_AUTH_TY
   include_cert(CONFIG_GOLIOTH_SAMPLE_HARDCODED_CRT_PATH crt)
   include_cert(CONFIG_GOLIOTH_SAMPLE_HARDCODED_KEY_PATH key)
 endif()
-
-if(CONFIG_GOLIOTH_SAMPLE_CREDENTIALS_NSI)
-  target_sources(native_simulator INTERFACE nsi_host_getenv.c)
-endif()

examples/zephyr/common/credentials_nsi.c

@@ -12,7 +12,7 @@ LOG_MODULE_REGISTER(golioth_credentials_nsi, CONFIG_GOLIOTH_DEBUG_DEFAULT_LOG_LE
 #include <zephyr/init.h>
 #include <zephyr/net/tls_credentials.h>
 
-#include "nsi_host_getenv.h"
+#include <nsi_host_trampolines.h>
 
 /*
  * TLS credentials subsystem just remembers pointers to memory areas where