Remove unused imports

As found by LGTM.com.

Change-Id: I1704f10f9bab1b11ab22824aca0cfcdcb47fef2f
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

util/locale_database/cldr2qlocalexml.py

@@ -57,7 +57,6 @@ time zone names; see cldr2qtimezone.py for details.
 import os
 import sys
 
-from localetools import Error
 from cldr import CldrReader
 from qlocalexml import QLocaleXmlWriter
 from enumdata import language_list, script_list, country_list

util/locale_database/cldr2qtimezone.py

@@ -37,7 +37,6 @@ use.
 """
 
 import os
-import re
 import datetime
 import textwrap
 

util/locale_database/qlocalexml2cpp.py

@@ -37,7 +37,6 @@ import os
 import datetime
 
 from qlocalexml import QLocaleXmlReader
-from xml.dom import minidom
 from localetools import unicode2hex, wrap_list, Error, Transcriber, SourceFileEditor
 
 def compareLocaleKeys(key1, key2):