Merge pull request #4285 from github/nickrolfe/rm-old-version

Remove support for CodeQL CLI versions older than 2.21.4

Author: nickrolfe

extensions/ql-vscode/CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [UNRELEASED]
 
+- Remove support for CodeQL CLI versions older than 2.21.4. [#4285](https://github.com/github/vscode-codeql/pull/4285)
+
 ## 1.17.7 - 5 December 2025
 
 - Rename command "CodeQL: Trim Overlay Base Cache" to "CodeQL: Trim Cache to Overlay-Base" for consistency with "CodeQL: Warm Overlay-Base Cache for [...]" commands. [#4204](https://github.com/github/vscode-codeql/pull/4204)

extensions/ql-vscode/src/codeql-cli/cli.ts

@@ -45,7 +45,7 @@ import type { LanguageClient } from "vscode-languageclient/node";
  * The oldest version of the CLI that we support. This is used to determine
  * whether to show a warning about the CLI being too old on startup.
  */
-export const OLDEST_SUPPORTED_CLI_VERSION = new SemVer("2.20.7");
+export const OLDEST_SUPPORTED_CLI_VERSION = new SemVer("2.21.4");
 
 /**
  * The version of the SARIF format that we are using.

extensions/ql-vscode/supported_cli_versions.json

@@ -3,6 +3,5 @@
   "v2.23.9",
   "v2.22.4",
   "v2.21.4",
-  "v2.20.7",
   "nightly"
 ]