Remove support for CodeQL CLI versions older than 2.9.4 (#2610)

Author: shati-patel

extensions/ql-vscode/CHANGELOG.md

@@ -2,13 +2,14 @@
 
 ## [UNRELEASED]
 
+- Remove support for CodeQL CLI versions older than 2.9.4. [#2610](https://github.com/github/vscode-codeql/pull/2610)
 - Implement syntax highlighting for the `additional` and `default` keywords. [#2609](https://github.com/github/vscode-codeql/pull/2609)
 
 ## 1.8.7 - 29 June 2023
 
 - Show a run button on the file tab for query files, that will start a local query. This button will only show when a local database is selected in the extension. [#2544](https://github.com/github/vscode-codeql/pull/2544)
 - Add `CodeQL: Quick Evaluation Count` command to generate the count summary statistics of the results set
-  without speding the time to compute locations and strings.
+  without spending the time to compute locations and strings.
 
 ## 1.8.6 - 14 June 2023
 

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

@@ -1790,7 +1790,7 @@ export function shouldDebugCliServer() {
 export class CliVersionConstraint {
   // 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.
-  public static OLDEST_SUPPORTED_CLI_VERSION = new SemVer("2.7.6");
+  public static OLDEST_SUPPORTED_CLI_VERSION = new SemVer("2.9.4");
 
   /**
    * CLI version where building QLX packs for remote queries is supported.

extensions/ql-vscode/supported_cli_versions.json

@@ -3,8 +3,6 @@
   "v2.13.5",
   "v2.12.7",
   "v2.11.6",
-  "v2.7.6",
-  "v2.8.5",
   "v2.9.4",
   "v2.10.5",
   "nightly"