Simplify attributes

rand_isaac/src/isaac.rs

@@ -453,7 +453,7 @@ mod test {
     }
 
     #[test]
-    #[cfg(all(feature="serde1"))]
+    #[cfg(feature="serde1")]
     fn test_isaac_serde() {
         use bincode;
         use std::io::{BufWriter, BufReader};

rand_isaac/src/isaac64.rs

@@ -445,7 +445,7 @@ mod test {
     }
 
     #[test]
-    #[cfg(all(feature="serde1"))]
+    #[cfg(feature="serde1")]
     fn test_isaac64_serde() {
         use bincode;
         use std::io::{BufWriter, BufReader};

rand_xorshift/src/xorshift.rs

@@ -178,7 +178,7 @@ mod tests {
         }
     }
 
-    #[cfg(all(feature="serde1"))]
+    #[cfg(feature="serde1")]
     #[test]
     fn test_xorshift_serde() {
         use bincode;