fix: gas estimation: don't special case paych collects

node/impl/full/gas.go

@@ -372,18 +372,6 @@ func gasEstimateGasLimit(
 	}
 	ret = (ret * int64(transitionalMulti*1024)) >> 10
 
-	// Special case for PaymentChannel collect, which is deleting actor
-	// We ignore errors in this special case since they CAN occur,
-	// and we just want to detect existing payment channel actors
-	st, err := smgr.ParentState(ts)
-	if err == nil {
-		act, err := st.GetActor(msg.To)
-		if err == nil && lbuiltin.IsPaymentChannelActor(act.Code) && msgIn.Method == builtin.MethodsPaych.Collect {
-			// add the refunded gas for DestroyActor back into the gas used
-			ret += 76e3
-		}
-	}
-
 	return ret, nil
 }