: Stabalize LocalRuntime

Author: Daksh14

tokio/src/runtime/builder.rs

@@ -1,12 +1,11 @@
 #![cfg_attr(loom, allow(unused_imports))]
 
 use crate::runtime::handle::Handle;
-#[cfg(tokio_unstable)]
-use crate::runtime::metrics::HistogramConfiguration;
 use crate::runtime::{
-    blocking, driver, Callback, HistogramBuilder, LocalOptions, LocalRuntime, Runtime,
-    TaskCallback, TaskMeta,
+    blocking, driver, Callback, HistogramBuilder, LocalOptions, LocalRuntime, Runtime, TaskCallback,
 };
+#[cfg(tokio_unstable)]
+use crate::runtime::{metrics::HistogramConfiguration, TaskMeta};
 use crate::util::rand::{RngSeed, RngSeedGenerator};
 
 use crate::runtime::blocking::BlockingPool;