[test262] Remove outdated SKIPs from status file.

R=littledan@chromium.org

Bug: v8:1569
Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng
Change-Id: I9c598afca288c68a64bf15c39e1043c6c37b6add
Reviewed-on: https://chromium-review.googlesource.com/543139Reviewed-by: Daniel Ehrenberg <littledan@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46100}

test/test262/test262.status

@@ -505,11 +505,6 @@
   'built-ins/Date/prototype/setFullYear/new-value-time-clip': [PASS, FAIL],
   'built-ins/Date/prototype/setMonth/new-value-time-clip': [PASS, FAIL],
 
-  # Symbol.toStringTag on namespace objects was made non-configurable, tests
-  # need to be updated.
-  'language/module-code/namespace/Symbol.toStringTag': [SKIP],
-  'language/module-code/namespace/internals/delete-non-exported': [SKIP],
-
   ############################ SKIPPED TESTS #############################
 
   # These tests take a looong time to run.