Add delete file on successful submit

scripts/submit.py

@@ -63,6 +63,7 @@ def main():
         if int.from_bytes(r, byteorder='big'):
             sys.stderr.write('error {}'.format(r))
             sys.exit(1)
+        os.unlink(fpath)
         logg.debug('submitted {} {} status {}'.format(fpath, tx, r))
 
 if __name__ == '__main__':