Removal of scanrun testnet block explorer (#550)

Author: emperorjm

content/5.resources/3.blockexplorers.md

@@ -32,7 +32,6 @@ Here are some of the available block explorers for Archway's testnet, Constantin
 - <a href="https://www.mintscan.io/archway-testnet" target="_blank"> Mintscan </a>
 - <a href="https://testnet.archway.explorers.guru/" target="_blank"> Nodes Guru</a>
 - <a href="https://explorer.nodestake.top/archway-testnet" target="_blank"> NodeStake </a>
-- <a href="https://scanrun.io/archway-testnet" target="_blank"> ScanRun </a>
 - <a href="https://archgregator.online/" target="_blank">Archgregator</a>
 
 ## Devnet