message: [test] Remove flakiness decorator from TestObjCDynamicSBType
  The quoted bug report (llvm.org/PR20270) was closed in 2014.
diff: @@ -6,7 +6,6 @@ from __future__ import print_function
  import lldb
  -from lldbsuite.test.decorators import *
  from lldbsuite.test.lldbtest import *
  from lldbsuite.test import lldbutil
  @@ -24,7 +23,6 @@ class ExprCommandCallStopContinueTestCase(TestBase):
  '// Please test these expressions while stopped at this line:')
  self.func_line = line_number('main.cpp', '{5, "five"}')
  - @expectedFlakeyDarwin("llvm.org/pr20274")
  def test(self):
  """Test gathering result from interrupted function call."""
  self.build()
  