[css-contain] Remove passing tests from TestExpectations

These tests had issues that have been fixed in WPT so they now pass:
* contain-layout-cell-001 and contain-layout-cell-002 fixed by
  web-platform-tests/wpt#12926
* contain-size-025 fixed by
  web-platform-tests/wpt#12960
* contain-layout-formatting-context-margin-001.html fixed by
  https://bugzilla.mozilla.org/show_bug.cgi?id=1490111

Change-Id: I238fd8df20a99536d65815061e10b32b0d59f21f
Reviewed-on: https://chromium-review.googlesource.com/1226591
Commit-Queue: Emil A Eklund <eae@chromium.org>
Reviewed-by: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591296}

third_party/WebKit/LayoutTests/TestExpectations

@@ -304,14 +304,11 @@ crbug.com/174167 external/wpt/css/css-tables/visibility-collapse-rowcol-002.html
 crbug.com/880802 external/wpt/css/css-contain/contain-layout-017.html [ Failure ]
 crbug.com/882333 external/wpt/css/css-contain/contain-layout-baseline-001.html [ Failure ]
 crbug.com/626703 external/wpt/css/css-contain/contain-layout-breaks-002.html [ Failure ]
-crbug.com/626703 external/wpt/css/css-contain/contain-layout-cell-001.html [ Failure ]
-crbug.com/626703 external/wpt/css/css-contain/contain-layout-cell-002.html [ Failure ]
 crbug.com/847274 external/wpt/css/css-contain/contain-paint-005.html [ Failure ]
 crbug.com/847274 external/wpt/css/css-contain/contain-paint-006.html [ Failure ]
 crbug.com/880802 external/wpt/css/css-contain/contain-paint-021.html [ Failure ]
 crbug.com/882367 external/wpt/css/css-contain/contain-paint-clip-015.html [ Failure ]
 crbug.com/882367 external/wpt/css/css-contain/contain-paint-clip-016.html [ Failure ]
-crbug.com/626703 [ Linux Win ] external/wpt/css/css-contain/contain-size-025.html [ Failure ]
 crbug.com/882333 external/wpt/css/css-contain/contain-size-baseline-001.html [ Failure ]
 crbug.com/855263 external/wpt/css/css-contain/contain-size-breaks-001.html [ Failure ]
 crbug.com/855261 external/wpt/css/css-contain/contain-size-grid-002.html [ Failure ]
@@ -325,7 +322,6 @@ crbug.com/882385 external/wpt/css/css-contain/quote-scoping-001.html [ Failure ]
 crbug.com/882385 external/wpt/css/css-contain/quote-scoping-002.html [ Failure ]
 crbug.com/882385 external/wpt/css/css-contain/quote-scoping-003.html [ Failure ]
 crbug.com/882385 external/wpt/css/css-contain/quote-scoping-004.html [ Failure ]
-crbug.com/881057 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/contain/contain-layout-formatting-context-margin-001.html [ Failure ]
 crbug.com/882322 external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/contain/contain-paint-clip-002.html [ Failure ]
 crbug.com/881057 [ Mac ] external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/contain/contain-paint-clip-003.html [ Failure ]
 crbug.com/881057 [ Mac ] external/wpt/css/vendor-imports/mozilla/mozilla-central-reftests/contain/contain-paint-clip-004.html [ Failure ]