`builtins.lambdaMeta` is leaking into the function index

[h7x4]

What happened
The bug you encountered

noogle.dev reveals nonexistent builtin lambdaMeta on search, possibly coming from https://github.com/nix-community/noogle/blob/main/nixPlugin/plugin.cc

Steps to Reproduce
Steps to reproduce the behavior:

1. Go to https://noogle.dev
2. Click on search bar
3. Type "lambdaMeta" (without clicking enter)
4. See suggestions (not search result)

Expected behavior
A clear and concise description of what you expected to happen.

Should probably be hidden away, seems to be for internal usage?

**Screenshots** If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]
• Screen resolution (optional)

or

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]