f - drop unnecessary check

Author: jkczyz

lightning/src/ln/channel.rs

@@ -10689,17 +10689,6 @@ where
 			});
 		}
 
-		let funding_inputs = contribution.inputs();
-		let funding_outputs = contribution.outputs();
-		if !funding_inputs.is_empty() && !funding_outputs.is_empty() {
-			return Err(APIError::APIMisuseError {
-				err: format!(
-					"Channel {} cannot be both spliced in and out; operation not supported",
-					self.context.channel_id(),
-				),
-			});
-		}
-
 		// Note: post-splice channel value is not yet known at this point, counterparty contribution is not known
 		// (Cannot test for miminum required post-splice channel value)