Move wallet airdrop retries into fullnode start script

ci/localnet-sanity.sh

@@ -18,12 +18,6 @@ for cmd in $backgroundCommands; do
   echo "--- Start $cmd"
   rm -f log-"$cmd".txt
   multinode-demo/"$cmd".sh > log-"$cmd".txt 2>&1 &
-  if [[ $cmd = drone ]]; then
-    # Give the drone time to startup before the fullnodes attempt to airdrop
-    # from it (TODO: alternatively adjust `solana-wallet airdrop` to retry on
-    # "Connection refused" errors)
-    sleep 2
-  fi
   declare pid=$!
   pids+=("$pid")
   echo "pid: $pid"