Remove unused import

src/data_provider/web_api.rs

@@ -1,7 +1,6 @@
 use crate::dictionary::app_data_dir;
 use std::io;
 use log::info;
-use reqwest::Error;
 use tokio::fs::{File, OpenOptions};
 use tokio::io::{AsyncReadExt, AsyncWriteExt};
 use zstd::{DEFAULT_COMPRESSION_LEVEL, Decoder, Encoder};