fix

juno_samples/edge_detection/Cargo.toml

@@ -15,7 +15,6 @@ required-features = ["opencv"]
 
 [lib]
 path = "src/lib.rs"
-required-features = ["opencv"]
 
 [build-dependencies]
 juno_build = { path = "../../juno_build" }

juno_samples/edge_detection/src/lib.rs

+#![cfg(feature = "opencv")]
 #![feature(concat_idents)]
 
 mod edge_detection_rust;