Remove unncessary call remove_from_peers_set (#4742)
... this is superfluous because set_reserved_peers implementation already calls this method here: https://github.com/paritytech/polkadot-sdk/blob/cdb297b1 /substrate/client/network/src/protocol_controller.rs#L571, so the call just ends producing this warnings whenever we manipulate the peers set. ``` Trying to remove unknown reserved node 12D3KooWRCePWvHoBbz9PSkw4aogtdVqkVDhiwpcHZCqh4hdPTXC from SetId(3) peerset warnings (from different peers) ``` Signed-off-by: Alexandru Gheorghe <[email protected]>