[strong] Remove all remainders of strong mode

test/cctest/cctest.status

 # Copyright 2011 the V8 project authors. All rights reserved.
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 # modification, are permitted provided that the following conditions are
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 #
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@@ skipping 71 matching lines @@
   # BUG(v8:4358). Hangs flakily.
   'test-debug/ProcessDebugMessagesThreaded': [SKIP],
 
   # BUG(2340). Preprocessing stack traces is disabled at the moment.
   'test-heap/PreprocessStackTrace': [FAIL],
 
   # BUG(4333). Function name inferrer does not work for ES6 clases.
   'test-func-name-inference/UpperCaseClass': [FAIL],
   'test-func-name-inference/LowerCaseClass': [FAIL],
 
-  # BUG(3956). Strong mode is being deprecated. Decide about these tests.
-  'test-api/StrongModeAccessCheckAllowed': [FAIL],
-  'test-api/StrongModeAccessCheckBlocked': [FAIL],
-
   ##############################################################################
   # TurboFan compiler failures.
 
   # Some tests are just too slow to run for now.
   'test-heap/IncrementalMarkingStepMakesBigProgressWithLargeObjects': [PASS, NO_VARIANTS],
   'test-heap-profiler/ManyLocalsInSharedContext': [PASS, NO_VARIANTS],
   'test-serialize/CodeSerializerLargeCodeObject': [PASS, NO_VARIANTS],
   'test-debug/ThreadedDebugging': [PASS, NO_VARIANTS],
   # BUG(3742).
   'test-mark-compact/MarkCompactCollector': [PASS, ['arch==arm', NO_VARIANTS]],
@@ skipping 455 matching lines @@
   'test-heap/IncrementalMarkingPreservesMonomorphicConstructor': [FAIL],
   'test-heap/IncrementalMarkingPreservesMonomorphicCallIC': [FAIL],
   'test-heap/CompilationCacheCachingBehavior': [FAIL],
   'test-heap/CellsInOptimizedCodeAreWeak': [FAIL],
   'test-run-inlining/InlineTwice': [FAIL],
   'test-serialize/CodeSerializerInternalReference': [FAIL, ['arch == arm or arch == arm64', PASS]],
 
 }],  # ignition == True
 
 ]