Unskip debugger tests after GC fix.

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index ec23b0e0b06cbed4805f88701beddc89c0c469a3..789aed0aca92af9dac3d4ceb475b18a8129fbe4f 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -288,9 +288,6 @@
   'harmony/unicode-regexp-ignore-case-noi18n': [FAIL, ['no_i18n == True', PASS]],
   # desugaring regexp property class relies on ICU.
   'harmony/regexp-property-*': [PASS, ['no_i18n == True', FAIL]],
-
-  # BUG(v8:4894).
-  'es6/debug-step-into-constructor': [PASS, ['system == linux and arch == x64 and mode == release ', FAST_VARIANTS]],
 }],  # ALWAYS
 
 ['novfp3 == True', {
@@ -655,9 +652,6 @@
 
   # BUG(v8:4495).
   'es6/collections': [PASS, ['arch == ia32', FAST_VARIANTS]],
-
-  # BUG(v8:4893).
-  'regress/regress-crbug-506443': [PASS, ['no_snap', FAST_VARIANTS]],
 }],  # 'system == windows'
 
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