Remove multicol-span-all-button tests fuzziness.

This hid an actual bug, a recent regression introduced by
CSSGapDecoration.

Bug: 513276592, 41458840
Change-Id: I590f3b51ec2dcebf9ce1c0c6f6197dd913c0abf4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7850117
Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Auto-Submit: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1631226}

Author: mstensho

css/css-multicol/multicol-span-all-button-002.html

@@ -6,7 +6,6 @@
   <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
   <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span">
   <link rel="match" href="multicol-span-all-button-002-ref.html">
-  <meta name="fuzzy" content="maxDifference=0-239;totalPixels=0-160">
   <meta name="assert" content="This test checks the page is rendered correctly for a overflow:hidden and position:absolute button multi-column container with a column-span:all child and position:absolute boxes.">
 
   <style>

css/css-multicol/multicol-span-all-button-003.html

@@ -6,7 +6,6 @@
   <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
   <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span">
   <link rel="match" href="multicol-span-all-button-003-ref.html">
-  <meta name="fuzzy" content="maxDifference=0-239;totalPixels=0-160">
   <meta name="assert" content="This test checks the page is rendered correctly for a overflow:hidden and position:absolute button multi-column container with a column-span:all child and position:absolute boxes.">
 
   <style>