Disable IntelliSense for Plain Text in VS Code

gistfile1.txt

# Ctl+Shift+P > Language Specific Settings > Plain Text

# Find the plaintext settings and add editor.quickSuggestions: false:
"[plaintext]": {
        "editor.quickSuggestions": {
            "other": false,
            "comments": false,
            "strings": false
        }