Revert of Enable strict coverage for step module

recipe_modules/step/tests/timeout.py

-# Copyright 2017 The LUCI Authors. All rights reserved.
-# Use of this source code is governed under the Apache License, Version 2.0
-# that can be found in the LICENSE file.
-
-from recipe_engine import recipe_api
-
-
-DEPS = [
-  'properties',
-  'step',
-]
-
-
-PROPERTIES = {
-  'timeout': recipe_api.Property(default=0, kind=int),
-}
-
-
-def RunSteps(api, timeout):
-  # Timeout causes the recipe engine to raise an exception if your step takes
-  # longer to run than you allow. Units are seconds.
-  try:
-    api.step('timeout', ['sleep', '20'], timeout=1)
-  except api.step.StepTimeout:
-    api.step('caught timeout', [])
-    raise
-
-
-def GenTests(api):
-  yield (
-      api.test('timeout') +
-      api.properties(timeout=1) +
-      api.step_data('timeout', times_out_after=20)
-    )