Remove empty setUp and tearDown methods from sqlite3 tests

They are not used as base classes by another tests so they
can safely be removed.

Lib/sqlite3/test/dbapi.py

@@ -695,12 +695,6 @@ class ExtensionTests(unittest.TestCase):
         self.assertEqual(result, 5, "Basic test of Connection.executescript")
 
 class ClosedConTests(unittest.TestCase):
-    def setUp(self):
-        pass
-
-    def tearDown(self):
-        pass
-
     def CheckClosedConCursor(self):
         con = sqlite.connect(":memory:")
         con.close()
@@ -768,12 +762,6 @@ class ClosedConTests(unittest.TestCase):
             con()
 
 class ClosedCurTests(unittest.TestCase):
-    def setUp(self):
-        pass
-
-    def tearDown(self):
-        pass
-
     def CheckClosed(self):
         con = sqlite.connect(":memory:")
         cur = con.cursor()

Lib/sqlite3/test/hooks.py

@@ -25,12 +25,6 @@ import unittest
 import sqlite3 as sqlite
 
 class CollationTests(unittest.TestCase):
-    def setUp(self):
-        pass
-
-    def tearDown(self):
-        pass
-
     def CheckCreateCollationNotCallable(self):
         con = sqlite.connect(":memory:")
         with self.assertRaises(TypeError) as cm: