[rust] Remove Dead Testing Code

The next rust roll has stricter dead code checks which pick up these
structs as dead code.

Bug: 342633927
Change-Id: Ic188637f3a73dee83701edf5ce8e527bb90cd32b
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1054333
Reviewed-by: Ben Keller <galbanum@google.com>
Commit-Queue: Gwen Mittertreiner <gmtr@google.com>
Reviewed-by: Bruno Dal Bo <brunodalbo@google.com>
Reviewed-by: Casey Dahlin <sadmac@google.com>
Fuchsia-Auto-Submit: Gwen Mittertreiner <gmtr@google.com>

Author: gmittert

src/connectivity/network/netstack3/src/bindings/util.rs

@@ -1398,17 +1398,6 @@ mod tests {
         }
     }
 
-    struct EmptyFakeConversionContext;
-    impl ConversionContext for EmptyFakeConversionContext {
-        fn get_core_id(&self, _binding_id: BindingId) -> Option<DeviceId<BindingsCtx>> {
-            None
-        }
-
-        fn get_binding_id(&self, core_id: DeviceId<BindingsCtx>) -> BindingId {
-            core_id.bindings_id().id
-        }
-    }
-
     fn create_addr_v4(bytes: [u8; 4]) -> (IpAddr, fidl_net::IpAddress) {
         let core = IpAddr::V4(Ipv4Addr::from(bytes));
         let fidl = fidl_net::IpAddress::Ipv4(fidl_net::Ipv4Address { addr: bytes });

src/developer/ffx/daemon/server/src/daemon.rs

@@ -973,19 +973,6 @@ mod test {
         assert!(result.is_err());
     }
 
-    struct FakeConfigReader {
-        query_expected: String,
-        value: String,
-    }
-
-    #[async_trait(?Send)]
-    impl ConfigReader for FakeConfigReader {
-        async fn get(&self, q: &str) -> Result<Option<String>> {
-            assert_eq!(q, self.query_expected);
-            Ok(Some(self.value.clone()))
-        }
-    }
-
     #[fuchsia_async::run_singlethreaded(test)]
     async fn test_get_target_empty() {
         let tempdir = tempfile::tempdir().expect("Creating tempdir");

src/sys/pkg/bin/system-update-checker/src/apply.rs

@@ -199,23 +199,6 @@ mod test_apply_system_update_impl {
 
     const TEST_DEFAULT_UPDATE_URL: &str = "fuchsia-pkg://fuchsia.test/update";
 
-    struct DoNothingUpdateInstaller;
-    impl UpdateInstaller for DoNothingUpdateInstaller {
-        type UpdateAttempt =
-            futures::stream::Once<future::Ready<Result<State, MonitorUpdateAttemptError>>>;
-
-        fn start_update(
-            &mut self,
-            _update_url: AbsolutePackageUrl,
-            _options: Options,
-            _reboot_controller_server_end: Option<ServerEnd<RebootControllerMarker>>,
-        ) -> BoxFuture<'_, Result<Self::UpdateAttempt, UpdateAttemptError>> {
-            let info = UpdateInfo::builder().download_size(0).build();
-            let state = State::Complete(UpdateInfoAndProgress::done(info));
-            future::ok(futures::stream::once(future::ok(state))).boxed()
-        }
-    }
-
     struct WasCalledUpdateInstaller {
         was_called: bool,
     }