Remove use of wdiff from layout test runner.

third_party/WebKit/LayoutTests/fast/harness/results.html

Index: third_party/WebKit/LayoutTests/fast/harness/results.html
diff --git a/third_party/WebKit/LayoutTests/fast/harness/results.html b/third_party/WebKit/LayoutTests/fast/harness/results.html
index 0166837ad0c0325696e4eaf984a5502387b5927d..35af7a1f47f274f68af0fd88346cd89d59979ee1 100644
--- a/third_party/WebKit/LayoutTests/fast/harness/results.html
+++ b/third_party/WebKit/LayoutTests/fast/harness/results.html
@@ -542,9 +542,6 @@ function textResultLinks(test, prefix)
         resultLink(prefix, '-diff.txt', 'diff') +
         resultLink(prefix, '-pretty-diff.html', 'pretty diff');
 
-    if (globalState().results.has_wdiff)
-        html += resultLink(prefix, '-wdiff.html', 'wdiff');
-
     return html;
 }