Remove MetaMask login & LaunchDarkly integrations

[shahbaz17]

Description

Remove MetaMask unified login flow and LaunchDarkly feature-flag integration. Deleted AuthLogin components, AuthRedirect, NavbarWallet (components, styles, and SVGs), siwsrp auth helpers, launchdarkly plugin and client, useUser hook, and related constants. Simplified Root theme (removed LoginProvider / MetaMaskSDK wiring) and cleaned docusaurus config, tsconfig, package.json, package-lock.json, and CI workflow (removed LD_CLIENT_ID env). This pr removes unused/feature-specific code and related dependencies and references.

Issue(s) fixed

Fixes #

Preview

Checklist

• If this PR updates or adds documentation content that changes or adds technical meaning, it has received an approval from an engineer or DevRel from the relevant team.
• If this PR updates or adds documentation content, it has received an approval from a technical writer.

External contributor checklist

• I've read the contribution guidelines.
• I've created a new issue (or assigned myself to an existing issue) describing what this PR addresses.

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Note

Low Risk
Configuration-only cleanup with no changes to doc content or active auth flows in the shown diff.

Overview
Strips LaunchDarkly and docs-site login wiring from build configuration. CI no longer passes LD_CLIENT_ID, and docusaurus.config.js drops the LaunchDarkly plugin plus LD_CLIENT_ID and other login/dashboard env fields from customFields.

The config also removes the REF_ALLOW_LOGIN_PATH import and the commented custom-navbarWallet navbar item, and stops exposing VERCEL_ENV, DASHBOARD_URL, and LINEA_ENS_URL to the client via customFields.

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Project	Deployment	Actions	Updated (UTC)
metamask-docs	Ready	Preview	Aug 19, 2026 12:14pm