Update README.md (#1289)

Remove RPC tests section from README

README.md

@@ -85,12 +85,6 @@ $ curl -H 'Content-Type: application/json' --data '{ "jsonrpc":"2.0", "method":"
 After this step, you should have a validator node online with a session key for your node.
 For key management and validator rewards, consult our [validator guide online](https://docs.astar.network/build/validator-guide/configure-node).
 
-## Run RPC Tests
-
-RPC tests suite can be run for any release. To run tests go to <https://github.com/AstarNetwork/Astar/actions/workflows/rpcTest.yml>. Click Run workflow, in the dropdown input the release version tag you want to run the test suite. Then click the green Run workflow button to start the test suite.
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-![Screenshot from 2022-07-07 15-28-46](https://user-images.githubusercontent.com/874046/177785570-330c6613-237d-4190-bfed-69876209daf6.png)
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 ## Workspace Dependency Handling
 
 All dependencies should be listed inside the workspace's root `Cargo.toml` file.