i18n: update check-translation script to pass import checker

i18n/check-translation.py

@@ -1,9 +1,11 b''
 #!/usr/bin/env python
 #
 # check-translation.py - check Mercurial specific translation problems
+from __future__ import absolute_import
+
+import re
 
 import polib
-import re
 
 scanners = []
 checkers = []

tests/test-check-py3-compat.t

@@ -19,7 +19,6 b''
   contrib/python-zstandard/tests/test_estimate_sizes.py not using absolute_import
   contrib/python-zstandard/tests/test_module_attributes.py not using absolute_import
   contrib/python-zstandard/tests/test_train_dictionary.py not using absolute_import
-  i18n/check-translation.py not using absolute_import
   setup.py not using absolute_import
   tests/test-demandimport.py not using absolute_import