Revert of Add autocomplete values for CSS contain (patchset #1 id:1 of …

…https://codereview.chromium.org/2085523003/ )

Reason for revert:
https://chromium.googlesource.com/chromium/src/+/f2168263f19ab4f81c56d6258db7d9e6fa0b07fb already fixes this

Original issue's description:
> DevTools: Add autocomplete values for CSS contain
>
> BUG=619844
>
> Committed: https://crrev.com/ae37548c093fd06e2c99e9ddcb3b18e36759b07d
> Cr-Commit-Position: refs/heads/master@{#402270}

[email protected]
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=619844

Review-Url: https://codereview.chromium.org/2101083002
Cr-Commit-Position: refs/heads/master@{#402339}

front_end/sdk/CSSMetadata.js

@@ -639,9 +639,6 @@ WebInspector.CSSMetadata._propertyDataMap = {
         "normal", "multiply", "screen", "overlay", "darken", "lighten", "color-dodge", "color-burn", "hard-light", "soft-light",
         "difference", "exclusion", "hue", "saturation", "color", "luminosity", "unset"
     ] },
-    "contain": { values: [
-        "none", "strict", "content", "size", "layout", "style", "paint"
-    ] }
 }
 
 /**