[skip ci] remove useless item of TOC (#10581)

Signed-off-by: NThyeeZz <jialian.ji@zilliz.com>

DEVELOPMENT.md

@@ -4,26 +4,24 @@ This document will help to setup your development environment and run tests. If
 
 Table of contents
 =================
-- [Development](#development)
-- [Table of contents](#table-of-contents)
-  - [Building Milvus with Docker](#building-milvus-with-docker)
-  - [Building Milvus on a local OS/shell environment](#building-milvus-on-a-local-osshell-environment)
-    - [Hardware Requirements](#hardware-requirements)
-    - [Software Requirements](#software-requirements)
-      - [Dependencies](#dependencies)
-      - [CMake](#cmake)
-      - [Go](#go)
-      - [Docker & Docker Compose](#docker--docker-compose)
-    - [Building Milvus](#building-milvus)
-  - [A Quick Start for Testing Milvus](#a-quick-start-for-testing-milvus)
-    - [Presubmission Verification](#presubmission-verification)
-    - [Unit Tests](#unit-tests)
-    - [Code coverage](#code-coverage)
-    - [E2E Tests](#e2e-tests)
-    - [Test on local branch](#test-on-local-branch)
-      - [On Linux](#on-linux)
-      - [With docker](#with-docker)
-  - [GitHub Flow](#github-flow)
+- [Building Milvus with Docker](#building-milvus-with-docker)
+- [Building Milvus on a local OS/shell environment](#building-milvus-on-a-local-osshell-environment)
+  - [Hardware Requirements](#hardware-requirements)
+  - [Software Requirements](#software-requirements)
+    - [Dependencies](#dependencies)
+    - [CMake](#cmake)
+    - [Go](#go)
+    - [Docker & Docker Compose](#docker--docker-compose)
+  - [Building Milvus](#building-milvus)
+- [A Quick Start for Testing Milvus](#a-quick-start-for-testing-milvus)
+  - [Presubmission Verification](#presubmission-verification)
+  - [Unit Tests](#unit-tests)
+  - [Code coverage](#code-coverage)
+  - [E2E Tests](#e2e-tests)
+  - [Test on local branch](#test-on-local-branch)
+    - [On Linux](#on-linux)
+    - [With docker](#with-docker)
+- [GitHub Flow](#github-flow)
 
 
 ## Building Milvus with Docker