delete release notes 8.0 (#16891)

TOC.md

@@ -4,7 +4,7 @@
 - [Docs Home](https://docs.pingcap.com/)
 - About TiDB
   - [TiDB Introduction](/overview.md)
-  - [TiDB 8.0 Release Notes](/releases/release-8.0.0.md)
+  - [TiDB 7.6 Release Notes](/releases/release-7.6.0.md)
   - [Features](/basic-features.md)
   - [MySQL Compatibility](/mysql-compatibility.md)
   - [TiDB Limitations](/tidb-limitations.md)
@@ -1038,8 +1038,6 @@
   - [Release Timeline](/releases/release-timeline.md)
   - [TiDB Versioning](/releases/versioning.md)
   - [TiDB Installation Packages](/binary-package.md)
-  - v8.0
-    - [8.0.0-DMR](/releases/release-8.0.0.md)
   - v7.6
     - [7.6.0-DMR](/releases/release-7.6.0.md)
   - v7.5

releases/release-8.0.0.md

@@ -5,7 +5,9 @@ summary: Learn about the new features, compatibility changes, improvements, and
 
 # TiDB 8.0.0 Release Notes
 
-Release date: March 28, 2024
+> **Note:**
+>
+> Currently, TiDB v8.0.0 is still in development. The following content is subject to change before the official release.
 
 TiDB version: 8.0.0
 

releases/release-notes.md

@@ -5,10 +5,6 @@ aliases: ['/docs/dev/releases/release-notes/','/docs/dev/releases/rn/']
 
 # TiDB Release Notes
 
-## 8.0
-
-- [8.0.0-DMR](/releases/release-8.0.0.md): 2024-03-28
-
 ## 7.6
 
 - [7.6.0-DMR](/releases/release-7.6.0.md): 2024-01-25

releases/release-timeline.md

@@ -9,7 +9,6 @@ This document shows all the released TiDB versions in reverse chronological orde
 
 | Version | Release Date |
 | :--- | :--- |
-| [8.0.0](/releases/release-8.0.0.md) | 2024-03-28 |
 | [7.1.4](/releases/release-7.1.4.md) | 2024-03-11 |
 | [7.5.1](/releases/release-7.5.1.md) | 2024-02-29 |
 | [6.5.8](/releases/release-6.5.8.md) | 2024-02-02 |