Fix: Removed several module offerings

[nabetti1720]

Description of changes

Currently, the following functions are provided as modules in LLRT.

• Performance
• Navigator

This is a module that is not compatible with node.js (or has a name that does not exist) and should stop being offered as a module before it is misused.

In fact, the following code will result in a MODULE_NOT_FOUND error in node.js.

% node -e "const a = require('navigator');"  
node:internal/modules/cjs/loader:1148
  throw err;
  ^

Error: Cannot find module 'navigator'
Require stack:
- /Users/shinya/Workspaces/llrt-test/[eval]
    at Module._resolveFilename (node:internal/modules/cjs/loader:1145:15)
    at Module._load (node:internal/modules/cjs/loader:986:27)
    at Module.require (node:internal/modules/cjs/loader:1233:19)
    at require (node:internal/modules/helpers:179:18)
    at [eval]:1:11
    at runScriptInThisContext (node:internal/vm:209:10)
    at node:internal/process/execution:118:14
    at [eval]-wrapper:6:24
    at runScript (node:internal/process/execution:101:62)
    at evalScript (node:internal/process/execution:133:3) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [ '/Users/shinya/Workspaces/llrt-test/[eval]' ]
}

Node.js v20.13.1

In addition, it is necessary to continue to provide these functions from globalThis.

% ./llrt -e "console.log(globalThis.navigator.userAgent);"
llrt 0.1.15-beta

Checklist

• [x] Created unit tests in tests/unit and/or in Rust for my feature if needed
• [x] Ran make fix to format JS and apply Clippy auto fixes
• [x] Made sure my code didn't add any additional warnings: make check
• [x] Updated documentation if needed (API.md/README.md/Other)

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