Ensure platform template does not appear in repair (#157486)

homeassistant/components/template/helpers.py

@@ -17,6 +17,7 @@ from homeassistant.const import (
     CONF_ICON,
     CONF_ICON_TEMPLATE,
     CONF_NAME,
+    CONF_PLATFORM,
     CONF_STATE,
     CONF_UNIQUE_ID,
     CONF_VALUE_TEMPLATE,
@@ -257,6 +258,7 @@ def create_legacy_template_issue(
     deprecation_list.append(issue_id)
 
     try:
+        config.pop(CONF_PLATFORM, None)
         modified_yaml = format_migration_config(config)
         yaml_config = yaml_util.dump({DOMAIN: [{domain: [modified_yaml]}]})
         # Format to show up properly in a numbered bullet on the repair.

tests/components/template/test_helpers.py

@@ -597,6 +597,7 @@ async def test_legacy_deprecation(
     assert issue.domain == "template"
     assert issue.severity == ir.IssueSeverity.WARNING
     assert issue.translation_placeholders["breadcrumb"] == breadcrumb
+    assert "platform: template" not in issue.translation_placeholders["config"]
 
 
 @pytest.mark.parametrize(