core: remove pointless check for excessBlobGas nilness (#27797)

* core: check excessBlobGas in front
Signed-off-by: jsvisa <delweng@gmail.com>

* core: no need to manual panic
Signed-off-by: jsvisa <delweng@gmail.com>

* core: no comment
Signed-off-by: jsvisa <delweng@gmail.com>

---------
Signed-off-by: jsvisa <delweng@gmail.com>

core/state_transition.go

@@ -242,10 +242,6 @@ func (st *StateTransition) buyGas() error {
 	}
 	if st.evm.ChainConfig().IsCancun(st.evm.Context.BlockNumber, st.evm.Context.Time) {
 		if blobGas := st.blobGasUsed(); blobGas > 0 {
-			if st.evm.Context.ExcessBlobGas == nil {
-				// programming error
-				panic("missing field excess data gas")
-			}
 			// Check that the user has enough funds to cover blobGasUsed * tx.BlobGasFeeCap
 			blobBalanceCheck := new(big.Int).SetUint64(blobGas)
 			blobBalanceCheck.Mul(blobBalanceCheck, st.msg.BlobGasFeeCap)