clippy: remove needless bool literals

Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>

src/api2/tape/backup.rs

@@ -87,7 +87,7 @@ pub fn backup(
     // early check before starting worker
     check_drive_exists(&drive_config, &pool_config.drive)?;
 
-    let to_stdout = if rpcenv.env_type() == RpcEnvironmentType::CLI { true } else { false };
+    let to_stdout = rpcenv.env_type() == RpcEnvironmentType::CLI;
 
     let eject_media = eject_media.unwrap_or(false);
     let export_media_set = export_media_set.unwrap_or(false);