chore: remove deleted pubs dashboard from agent (#515)

Author: ali-behjati

pages/price-feeds/publish-data/useful-resources-for-publishers.mdx

@@ -2,7 +2,6 @@
 
 This page contains useful tools for publishers to analyse, monitor and review their price data.
 
-- [Pyth-Agent Web Dashboard](https://github.com/pyth-network/pyth-agent/blob/9c1dbbc90a78edb628644778f0ba1e7ea084c452/src/agent/dashboard.rs#L171): A simple dashboard to monitor publisher data on localhost:8888/dashboard
 - [Price Monitoring & Alerting Script](https://github.com/pyth-network/publisher-utils#monitoring): This monitoring script will provide alerts if a publishers data activity is suspicious i.e. price deviation, bad confidence interval
 - [Pyth Price Feeds & Metrics](https://pyth.network/price-feeds): Publishers can review their price data metrics for permissioned symbols. The conformance logs that can be downloaded contain useful metrics that show publisher uptime, price deviations and alerts. The metrics page can be accessed by selecting the environment > symbol > publisher key tab
 - [Pyth Publisher Ranking Page](https://pyth.network/publishers/ranking): This page provides a full breakdown of publisher ranking and inactive/active price feeds