[RLS] Mark text-editor-formatter.js as not timing out on Win

text-editor-formatter.js is no longer timing out on windows:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=webkit_layout_tests&tests=http%2Ftests%2Fdevtools%2Feditor%2Ftext-editor-formatter.js

While slow, the slowest run is 5s which is equal to the slowest mac
run. This patch removes the timeout expectation.

Bug: 781428
Change-Id: I707171e7a32224dc915570e692d33bf86d08d120
Reviewed-on: https://chromium-review.googlesource.com/941409Reviewed-by: Steve Kobes <skobes@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#539921}

third_party/WebKit/LayoutTests/TestExpectations

@@ -3390,7 +3390,6 @@ crbug.com/807110 external/wpt/media-source/mediasource-sourcebuffer-mode-timesta
 
 crbug.com/417782 [ Android ] fast/scrolling/scrollable-area-overflow-auto-display-none.html [ Failure Pass ]
 crbug.com/417782 [ Android ] fast/scrolling/scrollable-area-overflow-not-set.html [ Failure Crash Pass ]
-crbug.com/417782 [ Win ] http/tests/devtools/editor/text-editor-formatter.js [ Timeout ]
 crbug.com/417782 http/tests/devtools/tracing/timeline-paint/timeline-paint-with-layout-invalidations-on-deleted-node.js [ Timeout ]
 crbug.com/417782 http/tests/devtools/tracing/timeline-paint/timeline-paint-with-layout-invalidations.js [ Timeout ]
 crbug.com/417782 http/tests/devtools/tracing/timeline-paint/timeline-paint-with-style-recalc-invalidations.js [ Timeout ]