Delete rollup information (#88)

docs/build/getting-started/networks/overview.md

@@ -7,4 +7,3 @@ The Darwinia ecosystem consists of four official long-term networks:
 | **[Darwinia](./darwinia.md)** |                                EVM-compatible blockchain using the Substrate framework, featuring cross-chain capabilities.                                 |
 |     **[Crab](./crab.md)**     |                              Canary network for Darwinia, similar to Kusama for Polkadot, designed to expect and handle chaos.                              |
 | **[Koi](./koi.md)** |                          Primary test network for Darwinia, maintained to rigorously test new features before mainnet deployment.                           |
-|   **[Rollup](./rollup.md)**   | Partnership with AltLayer to develop an advanced Ethereum Op Stack rollup testnet, supported by Avail DA, showcasing cutting-edge blockchain data services. |

mkdocs.yml

@@ -366,6 +366,7 @@ plugins:
         "build/chain/run-evm-tracing-node.md": "node-operators/run-evm-tracing-node.md"
         "build/chain/run-dev-node.md": "build/getting-started/networks/dev-node.md"
         "build/getting-started/transfer-token.md": "community/guide/transfer-token.md"
+        "build/getting-started/networks/rollup.md": "build/getting-started/networks/overview.md"
         "build/getting-started/staking.md": "community/guide/staking.md"
         "build/getting-started/governance.md": "community/guide/governance.md"
         "build/getting-started/assethub-bridge.md": "community/guide/assethub-bridge.md"
@@ -401,7 +402,6 @@ nav:
             - Darwinia: "build/getting-started/networks/darwinia.md"
             - Crab: "build/getting-started/networks/crab.md"
             - Koi (Testnet): "build/getting-started/networks/koi.md"
-            - Rollup: "build/getting-started/networks/rollup.md"
             - Pangolin: "build/getting-started/networks/pangolin.md"
             - Development Node: "build/getting-started/networks/dev-node.md"
           - Wallets: "build/getting-started/wallets.md"