Add #[cfg(any(feature = "std", feature = "libm"))] to function `tes…

…t_integer_decode`

src/float.rs

@@ -2398,6 +2398,7 @@ mod tests {
     }
 
     /// Test the behavior of `Float::integer_decode` with the `given` input and `expected` output values.
+    #[cfg(any(feature = "std", feature = "libm"))]
     fn test_integer_decode<T>(given: T, expected: (u64, i16, i8))
     where
         T: crate::float::Float + core::fmt::LowerExp + core::fmt::Debug,