Revert "Reduce duplicate peer traffic for ledger data (#5126)" (#5300)

This reverts commit dd5e6559dd. It has
introduced a regression causing slow close times and syncing issues.
A fix will be attempted later.

include/xrpl/protocol/LedgerHeader.h

@@ -55,8 +55,6 @@ struct LedgerHeader
 
     // If validated is false, it means "not yet validated."
     // Once validated is true, it will never be set false at a later time.
-    // NOTE: If you are accessing this directly, you are probably doing it
-    //   wrong. Use LedgerMaster::isValidated().
     // VFALCO TODO Make this not mutable
     bool mutable validated = false;
     bool accepted = false;