go mod tidy thinks deprecated dependency is required.

## Bug Report

Please answer these questions before submitting your issue. Thanks!

### 1. Minimal reproduce step (Required)

run go get github.com/pingcap/tidb@version, where version is the commit hash of v6.1.2(latest release)
run go mod tidy

### 2. What did you expect to see? (Required)
go mod tidy should succeed

### 3. What did you see instead (Required)
it fails because it thinks tidb depends on pingcap/parser
I checked the tidb codebase, it doesn't seem to depend on that anymore (deprecated)

### 4. What is your TiDB version? (Required)
6.1.2

Is this some quirk with the go module system? running go get to get ToT of pingcap/parser would fix this for me, but it's not good since it's deprecated