Remove unnecessary sleep

Author: abicky

e2e/chains/bsc/scripts/create_bls_key.sh

@@ -3,7 +3,6 @@
 set wallet_password 1234567890
 
 set timeout 5
-sleep 10
 spawn geth bls account new --datadir [lindex $argv 0]
 expect "*assword:*"
 send "$wallet_password\r"