fix: remove obsolete code (#364)

Author: knopp

super_native_extensions/rust/src/context.rs

@@ -98,18 +98,6 @@ impl Context {
             Err(_) => CURRENT_CONTEXT_FALLBACK.with(|c| c.borrow().as_ref().map(|c| c.clone())),
         }
     }
-
-    #[cfg(feature = "mock")]
-    /// Helper function for unit tests. Will create temporary context,
-    /// run the future in run loop and wait until completed.
-    pub fn run_test(future: impl futures::Future + 'static) {
-        let context = Context::new();
-        Context::get().run_loop().spawn(async {
-            future.await;
-            Context::get().run_loop().stop();
-        });
-        context.run_loop().run();
-    }
 }
 
 thread_local! {