enable unused_lifetimes lint

src/database/abstraction/rocksdb.rs

@@ -156,7 +156,7 @@ impl KvTree for RocksDbEngineTree<'_> {
         Ok(())
     }
 
-    fn insert_batch<'a>(&self, iter: &mut dyn Iterator<Item = (Vec<u8>, Vec<u8>)>) -> Result<()> {
+    fn insert_batch(&self, iter: &mut dyn Iterator<Item = (Vec<u8>, Vec<u8>)>) -> Result<()> {
         let writeoptions = rocksdb::WriteOptions::default();
         for (key, value) in iter {
             self.db
@@ -230,7 +230,7 @@ impl KvTree for RocksDbEngineTree<'_> {
         Ok(new)
     }
 
-    fn increment_batch<'a>(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> {
+    fn increment_batch(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> {
         let readoptions = rocksdb::ReadOptions::default();
         let writeoptions = rocksdb::WriteOptions::default();
 

src/database/abstraction/sqlite.rs

@@ -197,7 +197,7 @@ impl KvTree for SqliteTable {
         Ok(())
     }
 
-    fn insert_batch<'a>(&self, iter: &mut dyn Iterator<Item = (Vec<u8>, Vec<u8>)>) -> Result<()> {
+    fn insert_batch(&self, iter: &mut dyn Iterator<Item = (Vec<u8>, Vec<u8>)>) -> Result<()> {
         let guard = self.engine.write_lock();
 
         guard.execute("BEGIN", [])?;
@@ -211,7 +211,7 @@ impl KvTree for SqliteTable {
         Ok(())
     }
 
-    fn increment_batch<'a>(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> {
+    fn increment_batch(&self, iter: &mut dyn Iterator<Item = Vec<u8>>) -> Result<()> {
         let guard = self.engine.write_lock();
 
         guard.execute("BEGIN", [])?;

src/database/key_value/rooms/search.rs

@@ -3,7 +3,7 @@ use ruma::RoomId;
 use crate::{database::KeyValueDatabase, service, services, utils, Result};
 
 impl service::rooms::search::Data for KeyValueDatabase {
-    fn index_pdu<'a>(&self, shortroomid: u64, pdu_id: &[u8], message_body: &str) -> Result<()> {
+    fn index_pdu(&self, shortroomid: u64, pdu_id: &[u8], message_body: &str) -> Result<()> {
         let mut batch = message_body
             .split_terminator(|c: char| !c.is_alphanumeric())
             .filter(|s| !s.is_empty())

src/database/key_value/rooms/state.rs

@@ -49,7 +49,7 @@ impl service::rooms::state::Data for KeyValueDatabase {
             .collect()
     }
 
-    fn set_forward_extremities<'a>(
+    fn set_forward_extremities(
         &self,
         room_id: &RoomId,
         event_ids: Vec<OwnedEventId>,