Remove obsolette unittest case

Signed-off-by: Václav Valíček <valicek1994@gmail.com>

tests/test_abcd.py

@@ -1,24 +0,0 @@
-import unittest
-
-
-class TestStringMethods(unittest.TestCase):
-
-	def test_upper(self):
-		self.assertEqual('foo'.upper(), 'FOO')
-
-	def test_isupper(self):
-		self.assertTrue('FOO'.isupper())
-		self.assertFalse('Foo'.isupper())
-
-	def test_split(self):
-		s = 'hello world'
-		self.assertEqual(s.split(), ['hello', 'world'])
-		# check that s.split fails when the separator is not a string
-		with self.assertRaises(TypeError):
-			s.split(2)
-
-
-
-if __name__ == '__main__':
-	unittest.main()
-