Remove unneeded seek

- The seek will be automatically called in `ZipFile.close`.

Author: danny0838

Lib/zipfile/__init__.py

@@ -2023,9 +2023,6 @@ def _remove_members(self, members, *, remove_physical=True, chunk_size=2**20):
             self.start_dir -= entry_offset
         self._didModify = True
 
-        # seek to the start of the central dir
-        fp.seek(self.start_dir)
-
     def _writecheck(self, zinfo):
         """Check for errors before writing a file to the archive."""
         if zinfo.filename in self.NameToInfo: