minor fix in becoming a validator

Author: LandauRaz

modules/guides/pages/becoming-a-validator/stake.adoc

@@ -57,7 +57,6 @@ Once the transfer is approved, you can lock your STRK tokens into the Staking co
 . The address to set as your rewards address
 . The address to set as your operational address
 . The number of STRK tokens to stake
-. `true` to enable delegation pooling and `false` otherwise
 
 [NOTE]
 ====