[test] Remove feature to mark flaky tests.

tools/run-tests.py

Index: tools/run-tests.py
diff --git a/tools/run-tests.py b/tools/run-tests.py
index 9525163ae1f33f68e3bb70ac7562e97de1bab861..ef6899f1e5bf4b545aa7ce609631beb70507490f 100755
--- a/tools/run-tests.py
+++ b/tools/run-tests.py
@@ -226,9 +226,6 @@ def BuildOptions():
                     default=False, action="store_true")
   result.add_option("--cat", help="Print the source of the tests",
                     default=False, action="store_true")
-  result.add_option("--flaky-tests",
-                    help="Regard tests marked as flaky (run|skip|dontcare)",
-                    default="dontcare")
   result.add_option("--slow-tests",
                     help="Regard slow tests (run|skip|dontcare)",
                     default="dontcare")
@@ -302,7 +299,7 @@ def BuildOptions():
                           " (verbose, dots, color, mono)"),
                     choices=progress.PROGRESS_INDICATORS.keys(), default="mono")
   result.add_option("--quickcheck", default=False, action="store_true",
-                    help=("Quick check mode (skip slow/flaky tests)"))
+                    help=("Quick check mode (skip slow tests)"))
   result.add_option("--report", help="Print a summary of the tests to be run",
                     default=False, action="store_true")
   result.add_option("--json-test-results",
@@ -502,7 +499,6 @@ def ProcessOptions(options):
     return False
   if options.quickcheck:
     VARIANTS = ["default", "stress"]
-    options.flaky_tests = "skip"
     options.slow_tests = "skip"
     options.pass_fail_tests = "skip"
   if options.no_stress:
@@ -536,8 +532,6 @@ def ProcessOptions(options):
       print "Unknown %s mode %s" % (name, option)
       return False
     return True
-  if not CheckTestMode("flaky test", options.flaky_tests):
-    return False
   if not CheckTestMode("slow test", options.slow_tests):
     return False
   if not CheckTestMode("pass|fail test", options.pass_fail_tests):
@@ -737,8 +731,8 @@ def Execute(arch, mode, args, options, suites):
     if len(args) > 0:
       s.FilterTestCasesByArgs(args)
     all_tests += s.tests
-    s.FilterTestCasesByStatus(options.warn_unused, options.flaky_tests,
-                              options.slow_tests, options.pass_fail_tests)
+    s.FilterTestCasesByStatus(options.warn_unused, options.slow_tests,
+                              options.pass_fail_tests)
     if options.cat:
       verbose.PrintTestSource(s.tests)
       continue