fix some more pedantic clippy lints

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/database/abstraction/rocksdb.rs

@@ -174,7 +174,7 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
 		if !self.old_cfs.contains(&name.to_owned()) {
 			// Create if it didn't exist
 			debug!("Creating new column family in database: {}", name);
-			let _ = self.rocks.create_cf(name, &self.opts);
+			_ = self.rocks.create_cf(name, &self.opts);
 		}
 
 		Ok(Arc::new(RocksDbEngineTree {
@@ -253,8 +253,8 @@ impl KeyValueDatabaseEngine for Arc<Engine> {
 			match engine.create_new_backup_flush(&self.rocks, true) {
 				Err(e) => return Err(Box::new(e)),
 				Ok(()) => {
-					let _info = engine.get_backup_info();
-					let info = &_info.last().unwrap();
+					let engine_info = engine.get_backup_info();
+					let info = &engine_info.last().unwrap();
 					info!(
 						"Created database backup #{} using {} bytes in {} files",
 						info.backup_id, info.size, info.num_files,

src/database/abstraction/sqlite.rs

@@ -38,7 +38,7 @@ impl<T> Drop for NonAliasingBox<T> {
 		// this was done.
 		#[allow(clippy::undocumented_unsafe_blocks)]
 		unsafe {
-			let _ = Box::from_raw(self.0);
+			_ = Box::from_raw(self.0);
 		};
 	}
 }

src/database/abstraction/watchers.rs

@@ -47,7 +47,7 @@ impl Watchers {
 			let mut watchers = self.watchers.write().unwrap();
 			for prefix in triggered {
 				if let Some(tx) = watchers.remove(prefix) {
-					let _ = tx.0.send(());
+					_ = tx.0.send(());
 				}
 			}
 		};