Remove unnecessary function (NFC)

(cherry picked from commit 377ba47)

Author: adrian-prantl

lldb/test/API/repl/cpp_exceptions/TestSwiftCPPExceptionsInREPL.py

@@ -39,10 +39,6 @@ def test_repl_exceptions(self):
         self.build()
         self.do_repl_test()
 
-    def setUp(self):
-        # Call super's setUp().
-        TestBase.setUp(self)
-
     @skipIfRemote
     def do_repl_test(self):
         sdk_root = ""