[lldb] Remove __main__ from two tests (NFC) (#4029)

(cherry picked from commit f1cb889)

Author: kastiglione

lldb/test/API/functionalities/data-formatter/swift-typealias/TestSwiftTypeAliasFormatters.py

@@ -62,10 +62,3 @@ def cleanup():
         self.runCmd("type summary add -C no -v a.Foo -s hello")
         self.expect("frame variable f", substrs=['Foo) f = hello'])
         self.expect("frame variable b", substrs=['Bar) b = (value = 24)'])
-
-
-if __name__ == '__main__':
-    import atexit
-    lldb.SBDebugger.Initialize()
-    atexit.register(lambda: lldb.SBDebugger.Terminate())
-    unittest2.main()

lldb/test/API/lang/swift/optional_of_resilient/TestResilientObjectInOptional.py

@@ -56,9 +56,3 @@ def doTest(self):
         a_var = opt_var.GetChildMemberWithName("a")
         self.assertTrue(a_var.GetError().Success(), "The resilient child was 'a'")
         lldbutil.check_variable(self, a_var, False, value="1")
-        
-if __name__ == '__main__':
-    import atexit
-    lldb.SBDebugger.Initialize()
-    atexit.register(lldb.SBDebugger.Terminate)
-    unittest2.main()