Apply suggestion from @suricactus

Author: gounux

libqfieldsync/offline_converter.py

@@ -19,7 +19,6 @@
  ***************************************************************************/
 """
 
-import os
 import sys
 import tempfile
 from enum import Enum
@@ -690,9 +689,7 @@ def _export_basemap_as_mbtiles(
         try:
             # if the basemap file already exists on target destination,
             # the `native:tilesxyzmbtiles` alg will throw an error.
-            if basemap_export_path.exists():
-                if not basemap_export_path.unlink():
-                    raise Exception("...")
+            basemap_export_path.unlink(missing_ok=True)
 
             results, ok = alg.run(params, context, self._feedback)