Deleted memorywidget related tests from workbench

as they are part of mantidqt now

qt/applications/workbench/workbench/plugins/test/test_memorywidget/__init__.py

-# Mantid Repository : https://github.com/mantidproject/mantid
-#
-# Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
-#   NScD Oak Ridge National Laboratory, European Spallation Source,
-#   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
-# SPDX - License - Identifier: GPL - 3.0 +

qt/applications/workbench/workbench/plugins/test/test_memorywidget/test_memoryinfo.py

-# Mantid Repository : https://github.com/mantidproject/mantid
-#
-# Copyright © 2019 ISIS Rutherford Appleton Laboratory UKRI,
-#   NScD Oak Ridge National Laboratory, European Spallation Source,
-#   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
-# SPDX - License - Identifier: GPL - 3.0 +
-#    This file is part of the mantid workbench.
-#
-#
-import unittest
-from workbench.plugins.memorywidget.memoryinfo import get_memory_info
-
-
-class MemoryInfoTest(unittest.TestCase):
-
-    def test_memoryinfo(self):
-        mem_used_percent, mem_used, mem_total = get_memory_info()
-        self.assertTrue(isinstance(mem_used_percent, int))
-        self.assertTrue(0 <= mem_used_percent <= 100)
-
-
-if __name__ == "__main__":
-    unittest.main()

qt/applications/workbench/workbench/plugins/test/test_memorywidget/test_memorypresenter.py

-# Mantid Repository : https://github.com/mantidproject/mantid
-#
-# Copyright © 2019 ISIS Rutherford Appleton Laboratory UKRI,
-#   NScD Oak Ridge National Laboratory, European Spallation Source,
-#   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
-# SPDX - License - Identifier: GPL - 3.0 +
-#    This file is part of the mantid workbench.
-#
-#
-from workbench.plugins.memorywidget.memoryview import MemoryView, \
-    from_normal_to_critical, from_critical_to_normal
-from workbench.plugins.memorywidget.memorypresenter import MemoryPresenter
-
-import unittest
-from unittest import mock
-
-
-class MemoryPresenterTest(unittest.TestCase):
-    def setUp(self):
-        self.view = mock.create_autospec(MemoryView)
-        self.mock_view_internals()
-        self.presenter = MemoryPresenter(self.view)
-
-    def mock_view_internals(self):
-        self.view.critical = 90
-        self.view.memory_bar = mock.Mock()
-        self.view.memory_bar.value.return_value = 0
-        self.view.set_bar_color = mock.Mock()
-        self.view.set_value = mock.Mock()
-
-    def test_presenter(self):
-        self.assertTrue(from_normal_to_critical(self.presenter.view.critical,
-                        75, 95))
-        self.assertFalse(from_critical_to_normal(self.presenter.view.critical,
-                         75, 95))
-
-        self.assertFalse(from_normal_to_critical(self.presenter.view.critical,
-                         95, 75))
-        self.assertTrue(from_critical_to_normal(self.presenter.view.critical,
-                        95, 75))
-
-        self.assertEqual(self.presenter.view.set_value.call_count, 1)
-        self.assertEqual(self.presenter.view.set_bar_color.call_count, 1)
-
-        self.presenter.update_memory_usage()
-        self.assertEqual(self.presenter.view.set_value.call_count, 2)
-
-
-if __name__ == "__main__":
-    unittest.main()