add delete dict operations

src-core/examples/add_yomitan_dict_folder.rs

@@ -31,7 +31,7 @@ fn main() -> Result<(), anyhow::Error> {
                 "{:?}",
                 AppService::import_yomitan_zip_file(&mut writer, p, "ja")?,
             );
-            println!("[{:.2?}]", start.elapsed(),);
+            println!("[{:.2?}]", start.elapsed());
         } else {
             println!("not zip_file: {:?}", p);
         }

src-core/examples/remove_one_yomitan_dict.rs

@@ -10,7 +10,8 @@ fn main() -> Result<(), anyhow::Error> {
     let service = AppService::new(get_db_dir())?;
 
     let start = Instant::now();
-    service.get_yomitan_writer()?;
+    let mut writer = service.get_yomitan_writer()?;
+    AppService::remove_yomitan_dictionary(&mut writer, "JMnedict")?;
     println!("[{:.2?}]", start.elapsed());
 
     Ok(())