chore: drop empty module testing

src/lib.rs

@@ -82,9 +82,6 @@ pub(crate) fn is_zero(x: f64) -> bool {
     ulps_eq!(x, 0.0, max_ulps = 0)
 }
 
-// #[cfg(test)]
-mod testing;
-
 pub use crate::error::StatsError;
 
 /// Result type for the statrs library package that returns

src/statistics/iter_statistics.rs

@@ -245,12 +245,11 @@ where
 mod tests {
     use std::f64::consts;
     use rand::rngs::StdRng;
-    use rand::{SeedableRng};
+    use rand::SeedableRng;
     use rand::distributions::Distribution;
     use crate::distribution::Normal;
     use crate::statistics::Statistics;
     use crate::generate::{InfinitePeriodic, InfiniteSinusoidal};
-    use crate::testing;
 
     #[test]
     fn test_empty_data_returns_nan() {