Update WPT exporter's comment to drop fixed importer issue

Bug: 734121
Change-Id: I3393aeda531cde0b4d12644a362a8ba299e0aafe
Reviewed-on: https://chromium-review.googlesource.com/597849
Commit-Queue: Philip Jägenstedt <foolip@chromium.org>
Reviewed-by: Quinten Yearsley <qyearsley@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491975}

third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_exporter.py

@@ -234,11 +234,8 @@ class TestExporter(object):
                 'If this CL lands and Travis CI upstream is green, we will auto-merge the PR.\n\n'
                 'Note: Please check the Travis CI status (at the bottom of the PR) '
                 'before landing this CL and only land this CL if the status is green. '
-                'Otherwise a human needs to step in and resolve it manually, during which time '
-                'the WPT Importer is blocked from operating.\n\n'
-                '(There is ongoing work to 1. prevent CLs with red upstream PRs from landing '
-                '(https://crbug.com/711447) and 2. prevent the importer from being blocked on '
-                'stuck exportable changes (https://crbug.com/734121))\n\n'
+                'Otherwise a human needs to step in and resolve it manually. '
+                '(This may be automated in the future, see https://crbug.com/711447)\n\n'
                 'WPT Export docs:\n'
                 'https://chromium.googlesource.com/chromium/src/+/master'
                 '/docs/testing/web_platform_tests.md#Automatic-export-process'