Remote multinode scripts cleanup (#666)

- Also added support for stop nodes

multinode-demo/remote_validator.sh

@@ -2,8 +2,6 @@
 
 [[ -n $FORCE ]] || exit
 
-mkdir -p ~/.ssh ~/solana ~/.cargo/bin
-sudo apt-get --assume-yes install rsync libssl-dev
 chmod 600 ~/.ssh/authorized_keys ~/.ssh/id_rsa
 
 PATH="$HOME"/.cargo/bin:"$PATH"
@@ -12,7 +10,6 @@ ssh-keygen -R "$1"
 ssh-keyscan "$1" >>~/.ssh/known_hosts 2>/dev/null
 
 rsync -vPrz "$1":~/.cargo/bin/solana* ~/.cargo/bin/
-rsync -vPrz "$1":~/solana/fetch-perf-libs.sh ~/solana/
 
 # Run setup
 USE_INSTALL=1 ./multinode-demo/setup.sh -p