Revert "core/types: deepcopy ExcessDataGas, DataGasUsed (ethereum#27767…

…)"

This reverts commit 0c56bf3.

core/types/block.go

@@ -284,14 +284,6 @@ func CopyHeader(h *Header) *Header {
 		cpy.WithdrawalsHash = new(common.Hash)
 		*cpy.WithdrawalsHash = *h.WithdrawalsHash
 	}
-	if h.ExcessDataGas != nil {
-		cpy.ExcessDataGas = new(uint64)
-		*cpy.ExcessDataGas = *h.ExcessDataGas
-	}
-	if h.DataGasUsed != nil {
-		cpy.DataGasUsed = new(uint64)
-		*cpy.DataGasUsed = *h.DataGasUsed
-	}
 	return &cpy
 }