Enable harmony tests for TurboFan that now pass.

R=jarin@chromium.org
TEST=mjsunit/harmony

Review URL: https://codereview.chromium.org/723983002

Cr-Commit-Position: refs/heads/master@{#25320}

test/mjsunit/mjsunit.status

@@ -59,13 +59,6 @@
   # from the deoptimizer to do that.
   'arguments-indirect': [PASS, NO_VARIANTS],
 
-  # TODO(rossberg): Typer doesn't like contexts very much.
-  'harmony/block-conflicts': [PASS, NO_VARIANTS],
-  'harmony/block-for': [PASS, NO_VARIANTS],
-  'harmony/block-leave': [PASS, NO_VARIANTS],
-  'harmony/block-let-crankshaft': [PASS, NO_VARIANTS],
-  'harmony/empty-for': [PASS, NO_VARIANTS],
-
   # TODO(verwaest): Some tests are over-restrictive about object layout.
   'array-constructor-feedback': [PASS, NO_VARIANTS],
   'array-feedback': [PASS, NO_VARIANTS],