Make BridgeLine::random() non-testing (for now)

src/bridge_table.rs

@@ -167,7 +167,7 @@ impl BridgeLine {
         }
     }
     /// Create a random BridgeLine for testing
-    #[cfg(test)]
+    //#[cfg(test)]
     pub fn random() -> Self {
         let mut rng = rand::thread_rng();
         let mut res: Self = Default::default();