bpo-42847: Normalise Lib/sqlite3/test/* file encodings (GH-24147)

Convert from ISO-8859-1 to UTF-8.
diff --git a/Lib/sqlite3/test/regression.py b/Lib/sqlite3/test/regression.py
index 1312424..c8e0b27 100644
--- a/Lib/sqlite3/test/regression.py
+++ b/Lib/sqlite3/test/regression.py
@@ -1,7 +1,6 @@
-#-*- coding: iso-8859-1 -*-
 # pysqlite2/test/regression.py: pysqlite regression tests
 #
-# Copyright (C) 2006-2010 Gerhard Häring <gh@ghaering.de>
+# Copyright (C) 2006-2010 Gerhard Häring <gh@ghaering.de>
 #
 # This file is part of pysqlite.
 #