removing devcontainer.json as it was overwriting the new one we just added (#20116)

.devcontainer.json

@@ -1,17 +0,0 @@
-// Codespaces environment for docs.github.com
-// For format details, see https://aka.ms/vscode-remote/devcontainer.json 
-{
-    "name": "docs.github.com",
-    "settings": {
-        "terminal.integrated.shell.linux": "/bin/bash",
-        "cSpell.language": ",en"
-    },
-    // Install pre-requisites and run a build to ensure we are ready to start serving docs.github.com locally (via `npm start`)
-    "postCreateCommand": "npm ci && npm run build",
-    "forwardPorts": [4000],
-    // Visual Studio Code extensions which help authoring for docs.github.com.
-    "extensions": [
-        "yzhang.markdown-all-in-one",
-        "streetsidesoftware.code-spell-checker"
-    ]
-}