Revert of Ship ES2015 sloppy-mode function hoisting, let, class

test/mjsunit/mjsunit.status

Index: test/mjsunit/mjsunit.status
diff --git a/test/mjsunit/mjsunit.status b/test/mjsunit/mjsunit.status
index ed111c48ae8ce231d6d66862eae1f7362fb49557..2031cff3686f46e60f68dea1c25413a808190a90 100644
--- a/test/mjsunit/mjsunit.status
+++ b/test/mjsunit/mjsunit.status
@@ -1081,10 +1081,6 @@
   'with-prototype': [SKIP],
   'with-readonly': [SKIP],
   'with-value': [SKIP],
-  'regress/regress-builtinbust-7': [SKIP],
-  'regress/regress-crbug-451770': [SKIP],
-  'regress/regress-crbug-503968': [SKIP],
-  'regress/regress-crbug-504729': [SKIP],
 }],  # ignition == True
 
 ['ignition == True and (arch == arm or arch == arm64)', {