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With the merge of I76befd9e2a054798e8e36500b723870f7c7ae328 the main images have dropped pip-and-virtualenv. Remove the plain variant testing. Change-Id: If442e15a0264821207725c1cc271b3ff646b0720
With the merge of I76befd9e2a054798e8e36500b723870f7c7ae328 the main images have dropped pip-and-virtualenv. Remove the plain variant testing. Change-Id: If442e15a0264821207725c1cc271b3ff646b0720