Update app.py

app.py

@@ -134,12 +134,6 @@ import shutil
 
 def convert_cbr_to_cbz(cbr_path):
     temp_dir = tempfile.mkdtemp()
-    try:
-        with rarfile.RarFile(cbr_path) as archive:
-            archive.extractall(temp_dir)
-    except rarfile.RarCannotExec:
-        raise RuntimeError("Cannot extract CBR. 'unrar' tool not found. Install 'unrar' or 'unrar-free'.")
-    
     cbz_path = cbr_path.replace('.cbr', '.cbz')
     with zipfile.ZipFile(cbz_path, 'w') as zipf:
         for root, _, files in os.walk(temp_dir):