Dont add wifi block to yaml if discovered device uses ethernet (#3882)

esphome/components/dashboard_import/__init__.py

@@ -3,6 +3,7 @@ from pathlib import Path
 import esphome.codegen as cg
 import esphome.config_validation as cv
 from esphome.components.packages import validate_source_shorthand
+from esphome.const import CONF_WIFI
 from esphome.wizard import wizard_file
 from esphome.yaml_util import dump
 
@@ -43,7 +44,9 @@ async def to_code(config):
     cg.add(dashboard_import_ns.set_package_import_url(config[CONF_PACKAGE_IMPORT_URL]))
 
 
-def import_config(path: str, name: str, project_name: str, import_url: str) -> None:
+def import_config(
+    path: str, name: str, project_name: str, import_url: str, network: str = CONF_WIFI
+) -> None:
     p = Path(path)
 
     if p.exists():
@@ -69,7 +72,9 @@ def import_config(path: str, name: str, project_name: str, import_url: str) -> N
                 "name_add_mac_suffix": False,
             },
         }
-        p.write_text(
-            dump(config) + WIFI_CONFIG,
-            encoding="utf8",
-        )
+        output = dump(config)
+
+        if network == CONF_WIFI:
+            output += WIFI_CONFIG
+
+        p.write_text(output, encoding="utf8")