!fixup

crates/matrix-sdk/src/event_cache/store.rs

@@ -12,7 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-use std::{collections::BTreeMap, fmt, iter::once, result::Result as StdResult, sync::Arc};
+use std::{collections::BTreeMap, fmt, iter::once, result::Result as StdResult};
 
 use async_trait::async_trait;
 use matrix_sdk_common::deserialized_responses::SyncTimelineEvent;