Update schema.v2.json

Author: github-actions[bot]

static/schema/schema.v2.json

@@ -136,11 +136,6 @@
 							"default": "@coderabbitai summary",
 							"description": "Placeholder in the PR/MR description that gets replaced with the high level summary."
 						},
-						"high_level_summary_in_walkthrough": {
-							"type": "boolean",
-							"default": false,
-							"description": "Include the high level summary in the walkthrough comment."
-						},
 						"auto_title_placeholder": {
 							"type": "string",
 							"default": "@coderabbitai",